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Class 11 Mathematics - Trigonometric Functions - Trigonometric functions and their properties Medium Quiz

Topic Quiz • 150 questions • 35 seconds per question.

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यदि \(\sin x+\cos x=\sqrt{2}\), तो \(\sin x\cos x\) का मान क्या होगा?

If \(\sin x+\cos x=\sqrt{2}\), what is the value of \(\sin x\cos x\)?

Explanation opens after your attempt
Correct Answer

B. \(\frac{1}{2}\)

Explanation

Simple Explanation

दोनों पक्षों का वर्ग करने पर \(1+2\sin x\cos x=2\) मिलता है। इसलिए \(\sin x\cos x=\frac{1}{2}\); ऐसे प्रश्नों में वर्ग करना उपयोगी है। / Squaring both sides gives \(1+2\sin x\cos x=2\). Hence \(\sin x\cos x=\frac{1}{2}\); squaring is useful in such questions.

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यदि \(\tan x=2\), तो \(\frac{\sin x}{\cos x}\) का मान क्या है?

If \(\tan x=2\), what is the value of \(\frac{\sin x}{\cos x}\)?

Explanation opens after your attempt
Correct Answer

A. (2)

Explanation

Simple Explanation

\(\tan x=\frac{\sin x}{\cos x}\) होता है। इसलिए दिया गया मान सीधे (2) है। / \(\tan x=\frac{\sin x}{\cos x}\). Therefore, the required value is directly (2).

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यदि \(\sec x=5\), तो \(\cos x\) का मान क्या है?

If \(\sec x=5\), what is the value of \(\cos x\)?

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Correct Answer

C. \(\frac{1}{5}\)

Explanation

Simple Explanation

\(\sec x=\frac{1}{\cos x}\) होता है। इसलिए \(\cos x=\frac{1}{5}\); व्युत्क्रम संबंध याद रखें। / \(\sec x=\frac{1}{\cos x}\). Hence \(\cos x=\frac{1}{5}\); remember reciprocal relations.

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यदि \(\cosec x=4\), तो \(\sin x\) का मान क्या है?

If \(\cosec x=4\), what is the value of \(\sin x\)?

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Correct Answer

D. \(\frac{1}{4}\)

Explanation

Simple Explanation

\(\cosec x=\frac{1}{\sin x}\) होता है। इसलिए \(\sin x=\frac{1}{4}\); हर व्युत्क्रम फलन को जोड़ी में याद करें। / \(\cosec x=\frac{1}{\sin x}\). Hence \(\sin x=\frac{1}{4}\); learn each reciprocal function as a pair.

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\(\frac{1-\cos^2 x}{\sin^2 x}\) का सरल मान क्या है?

What is the simplified value of \(\frac{1-\cos^2 x}{\sin^2 x}\)?

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Correct Answer

A. (1)

Explanation

Simple Explanation

क्योंकि \(1-\cos^2 x=\sin^2 x\), इसलिए अनुपात (1) है। पहचान को पहले बदलकर देखें। / Since \(1-\cos^2 x=\sin^2 x\), the ratio is (1). First convert using identities.

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\(\frac{1-\sin^2 x}{\cos^2 x}\) का सरल मान क्या है?

What is the simplified value of \(\frac{1-\sin^2 x}{\cos^2 x}\)?

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Correct Answer

B. (1)

Explanation

Simple Explanation

क्योंकि \(1-\sin^2 x=\cos^2 x\), इसलिए मान (1) होगा। \(\sin^2 x+\cos^2 x=1\) सबसे जरूरी पहचान है। / Since \(1-\sin^2 x=\cos^2 x\), the value is (1). \(\sin^2 x+\cos^2 x=1\) is the most important identity.

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फलन \(\sin 3x\) का काल क्या है?

What is the period of the function \(\sin 3x\)?

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Correct Answer

C. \(\frac{2\pi}{3}\)

Explanation

Simple Explanation

\(\sin kx\) का काल \(\frac{2\pi}{k}\) होता है। यहाँ (k=3), इसलिए काल \(\frac{2\pi}{3}\) है। / The period of \(\sin kx\) is \(\frac{2\pi}{k}\). Here (k=3), so the period is \(\frac{2\pi}{3}\).

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फलन \(\tan 4x\) का काल क्या है?

What is the period of the function \(\tan 4x\)?

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Correct Answer

D. \(\frac{\pi}{4}\)

Explanation

Simple Explanation

\(\tan kx\) का काल \(\frac{\pi}{k}\) होता है। (k=4) रखने पर काल \(\frac{\pi}{4}\) मिलता है। / The period of \(\tan kx\) is \(\frac{\pi}{k}\). Substituting (k=4) gives period \(\frac{\pi}{4}\).

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फलन \(2\cos x\) का परिसर क्या है?

What is the range of the function \(2\cos x\)?

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Correct Answer

A. ([-2,2])

Explanation

Simple Explanation

\(\cos x\) का परिसर ([-1,1]) है। (2) से गुणा करने पर परिसर ([-2,2]) हो जाता है। / The range of \(\cos x\) is ([-1,1]). Multiplying by (2) changes the range to ([-2,2]).

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फलन \(3\sin x+1\) का अधिकतम मान क्या है?

What is the maximum value of the function \(3\sin x+1\)?

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Correct Answer

C. (4)

Explanation

Simple Explanation

\(\sin x\) का अधिकतम मान (1) है। इसलिए \(3\sin x+1\) का अधिकतम मान (4) होगा। / The maximum value of \(\sin x\) is (1). Hence the maximum value of \(3\sin x+1\) is (4).

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फलन \(5-2\cos x\) का न्यूनतम मान क्या है?

What is the minimum value of the function \(5-2\cos x\)?

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Correct Answer

B. (3)

Explanation

Simple Explanation

\(\cos x\) का अधिकतम मान (1) है। इसलिए न्यूनतम मान (5-2=3) होगा। / The maximum value of \(\cos x\) is (1). Therefore, the minimum value is (5-2=3).

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यदि \(\sin x=\frac{5}{13}\) और (x) प्रथम चतुर्थांश में है, तो \(\tan x\) का मान क्या है?

If \(\sin x=\frac{5}{13}\) and (x) is in the first quadrant, what is the value of \(\tan x\)?

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Correct Answer

C. \(\frac{5}{12}\)

Explanation

Simple Explanation

\(\cos x=\frac{12}{13}\) और \(\tan x=\frac{\sin x}{\cos x}\) होगा। इसलिए \(\tan x=\frac{5}{12}\)। / \(\cos x=\frac{12}{13}\) and \(\tan x=\frac{\sin x}{\cos x}\). Hence \(\tan x=\frac{5}{12}\).

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यदि \(\cos x=\frac{8}{17}\) और (x) प्रथम चतुर्थांश में है, तो \(\cot x\) का मान क्या है?

If \(\cos x=\frac{8}{17}\) and (x) is in the first quadrant, what is the value of \(\cot x\)?

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Correct Answer

A. \(\frac{8}{15}\)

Explanation

Simple Explanation

\(\sin x=\frac{15}{17}\) मिलता है और \(\cot x=\frac{\cos x}{\sin x}\) होता है। इसलिए \(\cot x=\frac{8}{15}\)। / \(\sin x=\frac{15}{17}\) and \(\cot x=\frac{\cos x}{\sin x}\). Therefore, \(\cot x=\frac{8}{15}\).

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यदि \(\tan x=\frac{3}{4}\) और (x) प्रथम चतुर्थांश में है, तो \(\sin x\) का मान क्या है?

If \(\tan x=\frac{3}{4}\) and (x) is in the first quadrant, what is the value of \(\sin x\)?

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Correct Answer

B. \(\frac{3}{5}\)

Explanation

Simple Explanation

\(\tan x=\frac{3}{4}\) से समकोण त्रिभुज में कर्ण (5) होगा। इसलिए \(\sin x=\frac{3}{5}\)। / From \(\tan x=\frac{3}{4}\), the hypotenuse in a right triangle is (5). Hence \(\sin x=\frac{3}{5}\).

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यदि \(\cot x=\frac{5}{12}\) और (x) प्रथम चतुर्थांश में है, तो \(\cos x\) का मान क्या है?

If \(\cot x=\frac{5}{12}\) and (x) is in the first quadrant, what is the value of \(\cos x\)?

Explanation opens after your attempt
Correct Answer

C. \(\frac{5}{13}\)

Explanation

Simple Explanation

\(\cot x=\frac{5}{12}\) में आसन्न (5) और सामने (12) मानें। कर्ण (13) होगा, इसलिए \(\cos x=\frac{5}{13}\)। / For \(\cot x=\frac{5}{12}\), take adjacent as (5) and opposite as (12). The hypotenuse is (13), so \(\cos x=\frac{5}{13}\).

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(\sin\(\pi+x\)+\sin\(\pi-x\)) का सरल मान क्या है?

What is the simplified value of (\sin\(\pi+x\)+\sin\(\pi-x\))?

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Correct Answer

B. (0)

Explanation

Simple Explanation

(\sin\(\pi+x\)=-\sin x) और (\sin\(\pi-x\)=\sin x) होते हैं। इसलिए योग (0) है। / (\sin\(\pi+x\)=-\sin x) and (\sin\(\pi-x\)=\sin x). Hence the sum is (0).

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(\cos\(\pi+x\)+\cos\(\pi-x\)) का सरल मान क्या है?

What is the simplified value of (\cos\(\pi+x\)+\cos\(\pi-x\))?

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Correct Answer

A. \(-2\cos x\)

Explanation

Simple Explanation

(\cos\(\pi+x\)=-\cos x) और (\cos\(\pi-x\)=-\cos x) होते हैं। इसलिए योग \(-2\cos x\) है। / (\cos\(\pi+x\)=-\cos x) and (\cos\(\pi-x\)=-\cos x). Therefore, the sum is \(-2\cos x\).

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(\tan\(\pi+x\)-\tan\(\pi-x\)) का सरल मान क्या है?

What is the simplified value of (\tan\(\pi+x\)-\tan\(\pi-x\))?

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Correct Answer

C. \(2\tan x\)

Explanation

Simple Explanation

(\tan\(\pi+x\)=\tan x) और (\tan\(\pi-x\)=-\tan x) होते हैं। इसलिए अंतर \(2\tan x\) है। / (\tan\(\pi+x\)=\tan x) and (\tan\(\pi-x\)=-\tan x). Therefore, the difference is \(2\tan x\).

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(\sin\(\frac{\pi}{2}+x\)) किसके बराबर है?

What is (\sin\(\frac{\pi}{2}+x\)) equal to?

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Correct Answer

D. \(\cos x\)

Explanation

Simple Explanation

\(\frac{\pi}{2}+x\) वाले रूप में \(\sin\) बदलकर \(\cos\) होता है और चिन्ह धनात्मक रहता है। इसलिए उत्तर \(\cos x\) है। / In the form \(\frac{\pi}{2}+x\), \(\sin\) changes to \(\cos\) and the sign remains positive. Hence the answer is \(\cos x\).

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(\cos\(\frac{\pi}{2}+x\)) किसके बराबर है?

What is (\cos\(\frac{\pi}{2}+x\)) equal to?

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Correct Answer

B. \(-\sin x\)

Explanation

Simple Explanation

\(\frac{\pi}{2}+x\) वाले रूप में \(\cos\) बदलकर \(\sin\) होता है और चिन्ह ऋणात्मक होता है। इसलिए \(-\sin x\) मिलता है। / In the form \(\frac{\pi}{2}+x\), \(\cos\) changes to \(\sin\) with a negative sign. Hence it becomes \(-\sin x\).

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(\tan\(\frac{\pi}{2}+x\)) किसके बराबर है?

What is (\tan\(\frac{\pi}{2}+x\)) equal to?

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Correct Answer

A. \(-\cot x\)

Explanation

Simple Explanation

\(\frac{\pi}{2}+x\) पर \(\tan\) बदलकर \(\cot\) होता है और चिन्ह ऋणात्मक होता है। इसलिए (\tan\(\frac{\pi}{2}+x\)=-\cot x)। / At \(\frac{\pi}{2}+x\), \(\tan\) changes to \(\cot\) with a negative sign. Hence (\tan\(\frac{\pi}{2}+x\)=-\cot x).

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(\sec\(\frac{\pi}{2}-x\)) किसके बराबर है?

What is (\sec\(\frac{\pi}{2}-x\)) equal to?

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Correct Answer

C. \(\cosec x\)

Explanation

Simple Explanation

(\cos\(\frac{\pi}{2}-x\)=\sin x), इसलिए (\sec\(\frac{\pi}{2}-x\)=\frac{1}{\sin x}=\cosec x)। पूरक कोण में सहफलन बनता है। / (\cos\(\frac{\pi}{2}-x\)=\sin x), so (\sec\(\frac{\pi}{2}-x\)=\frac{1}{\sin x}=\cosec x). Complementary angles give cofunctions.

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(\cosec\(\frac{\pi}{2}-x\)) किसके बराबर है?

What is (\cosec\(\frac{\pi}{2}-x\)) equal to?

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Correct Answer

A. \(\sec x\)

Explanation

Simple Explanation

(\sin\(\frac{\pi}{2}-x\)=\cos x), इसलिए (\cosec\(\frac{\pi}{2}-x\)=\frac{1}{\cos x}=\sec x)। व्युत्क्रम और पूरक पहचान साथ लगाएँ। / (\sin\(\frac{\pi}{2}-x\)=\cos x), so (\cosec\(\frac{\pi}{2}-x\)=\frac{1}{\cos x}=\sec x). Use reciprocal and cofunction identities together.

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यदि (x) दूसरे चतुर्थांश में है और \(\sin x=\frac{7}{25}\), तो \(\cos x\) का मान क्या है?

If (x) is in the second quadrant and \(\sin x=\frac{7}{25}\), what is the value of \(\cos x\)?

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Correct Answer

C. \(-\frac{24}{25}\)

Explanation

Simple Explanation

पहचान से \(|\cos x|=\frac{24}{25}\) मिलता है। दूसरे चतुर्थांश में \(\cos x\) ऋणात्मक होता है। / The identity gives \(|\cos x|=\frac{24}{25}\). In the second quadrant, \(\cos x\) is negative.

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यदि (x) तीसरे चतुर्थांश में है और \(\tan x=\frac{9}{40}\), तो \(\sec x\) का मान क्या है?

If (x) is in the third quadrant and \(\tan x=\frac{9}{40}\), what is the value of \(\sec x\)?

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Correct Answer

B. \(-\frac{41}{40}\)

Explanation

Simple Explanation

\(\sec^2 x=1+\tan^2 x\) से \(|\sec x|=\frac{41}{40}\) मिलता है। तीसरे चतुर्थांश में \(\sec x\) ऋणात्मक होता है। / From \(\sec^2 x=1+\tan^2 x\), \(|\sec x|=\frac{41}{40}\). In the third quadrant, \(\sec x\) is negative.

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यदि (x) चौथे चतुर्थांश में है और \(\cos x=\frac{15}{17}\), तो \(\sin x\) का मान क्या है?

If (x) is in the fourth quadrant and \(\cos x=\frac{15}{17}\), what is the value of \(\sin x\)?

Explanation opens after your attempt
Correct Answer

C. \(-\frac{8}{17}\)

Explanation

Simple Explanation

पहचान से \(|\sin x|=\frac{8}{17}\) मिलता है। चौथे चतुर्थांश में \(\sin x\) ऋणात्मक होता है। / The identity gives \(|\sin x|=\frac{8}{17}\). In the fourth quadrant, \(\sin x\) is negative.

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यदि (x) दूसरे चतुर्थांश में है और \(\cot x=-\frac{3}{4}\), तो \(\cosec x\) का मान क्या है?

If (x) is in the second quadrant and \(\cot x=-\frac{3}{4}\), what is the value of \(\cosec x\)?

Explanation opens after your attempt
Correct Answer

A. \(\frac{5}{4}\)

Explanation

Simple Explanation

\(\cosec^2 x=1+\cot^2 x\) से \(|\cosec x|=\frac{5}{4}\) मिलता है। दूसरे चतुर्थांश में \(\cosec x\) धनात्मक होता है। / From \(\cosec^2 x=1+\cot^2 x\), \(|\cosec x|=\frac{5}{4}\). In the second quadrant, \(\cosec x\) is positive.

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\(\frac{\sec^2 x-1}{\tan^2 x}\) का सरल मान क्या है?

What is the simplified value of \(\frac{\sec^2 x-1}{\tan^2 x}\)?

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Correct Answer

B. (1)

Explanation

Simple Explanation

\(\sec^2 x-1=\tan^2 x\) होता है। इसलिए पूरा भिन्न (1) के बराबर है। / \(\sec^2 x-1=\tan^2 x\). Therefore, the whole fraction equals (1).

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\(\frac{\cosec^2 x-1}{\cot^2 x}\) का सरल मान क्या है?

What is the simplified value of \(\frac{\cosec^2 x-1}{\cot^2 x}\)?

Explanation opens after your attempt
Correct Answer

C. (1)

Explanation

Simple Explanation

\(\cosec^2 x-1=\cot^2 x\) होता है। इसलिए अनुपात (1) है। / \(\cosec^2 x-1=\cot^2 x\). Hence the ratio is (1).

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(\(\sec x-\tan x\)\(\sec x+\tan x\)) का सरल मान क्या है?

What is the simplified value of (\(\sec x-\tan x\)\(\sec x+\tan x\))?

Explanation opens after your attempt
Correct Answer

D. (1)

Explanation

Simple Explanation

यह \(\sec^2 x-\tan^2 x\) बनता है। पहचान के अनुसार इसका मान (1) है। / It becomes \(\sec^2 x-\tan^2 x\). By identity, its value is (1).

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(\(\cosec x-\cot x\)\(\cosec x+\cot x\)) का सरल मान क्या है?

What is the simplified value of (\(\cosec x-\cot x\)\(\cosec x+\cot x\))?

Explanation opens after your attempt
Correct Answer

A. (1)

Explanation

Simple Explanation

यह \(\cosec^2 x-\cot^2 x\) बनता है। मानक पहचान से इसका मान (1) है। / It becomes \(\cosec^2 x-\cot^2 x\). By the standard identity, its value is (1).

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यदि \(\sin x+\cos x=1\), तो \(\sin x\cos x\) का मान क्या है?

If \(\sin x+\cos x=1\), what is the value of \(\sin x\cos x\)?

Explanation opens after your attempt
Correct Answer

B. (0)

Explanation

Simple Explanation

वर्ग करने पर \(1+2\sin x\cos x=1\) मिलता है। इसलिए \(\sin x\cos x=0\)। / Squaring gives \(1+2\sin x\cos x=1\). Therefore, \(\sin x\cos x=0\).

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यदि \(\sin x-\cos x=0\), तो \(\tan x\) का मान क्या है?

If \(\sin x-\cos x=0\), what is the value of \(\tan x\)?

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Correct Answer

C. (1)

Explanation

Simple Explanation

\(\sin x=\cos x\) होने पर \(\frac{\sin x}{\cos x}=1\) होगा। इसलिए \(\tan x=1\)। / When \(\sin x=\cos x\), \(\frac{\sin x}{\cos x}=1\). Hence \(\tan x=1\).

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यदि \(\sin^2 x=\frac{1}{4}\) और (x) प्रथम चतुर्थांश में है, तो \(\cos x\) का मान क्या है?

If \(\sin^2 x=\frac{1}{4}\) and (x) is in the first quadrant, what is the value of \(\cos x\)?

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Correct Answer

C. \(\frac{\sqrt{3}}{2}\)

Explanation

Simple Explanation

\(\cos^2 x=1-\frac{1}{4}=\frac{3}{4}\) होगा। प्रथम चतुर्थांश में \(\cos x=\frac{\sqrt{3}}{2}\) लिया जाता है। / \(\cos^2 x=1-\frac{1}{4}=\frac{3}{4}\). In the first quadrant, \(\cos x=\frac{\sqrt{3}}{2}\) is taken.

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यदि \(\cos^2 x=\frac{9}{16}\) और (x) चौथे चतुर्थांश में है, तो \(\sin x\) का मान क्या है?

If \(\cos^2 x=\frac{9}{16}\) and (x) is in the fourth quadrant, what is the value of \(\sin x\)?

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Correct Answer

B. \(-\frac{\sqrt{7}}{4}\)

Explanation

Simple Explanation

\(\sin^2 x=1-\frac{9}{16}=\frac{7}{16}\) होता है। चौथे चतुर्थांश में \(\sin x\) ऋणात्मक होता है। / \(\sin^2 x=1-\frac{9}{16}=\frac{7}{16}\). In the fourth quadrant, \(\sin x\) is negative.

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फलन \(\cos 5x\) का काल क्या है?

What is the period of the function \(\cos 5x\)?

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A. \(\frac{2\pi}{5}\)

Explanation

Simple Explanation

\(\cos kx\) का काल \(\frac{2\pi}{k}\) होता है। यहाँ (k=5), इसलिए काल \(\frac{2\pi}{5}\) है। / The period of \(\cos kx\) is \(\frac{2\pi}{k}\). Here (k=5), so the period is \(\frac{2\pi}{5}\).

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फलन \(4\sin 2x\) का आयाम क्या है?

What is the amplitude of the function \(4\sin 2x\)?

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Correct Answer

B. (4)

Explanation

Simple Explanation

फलन \(a\sin bx\) का आयाम (|a|) होता है। यहाँ (|a|=4) है। / The amplitude of \(a\sin bx\) is (|a|). Here (|a|=4).

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फलन \(-3\cos x\) का न्यूनतम मान क्या है?

What is the minimum value of the function \(-3\cos x\)?

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Correct Answer

C. (-3)

Explanation

Simple Explanation

\(\cos x\) का अधिकतम मान (1) है। इसलिए \(-3\cos x\) का न्यूनतम मान (-3) होगा। / The maximum value of \(\cos x\) is (1). Therefore, the minimum value of \(-3\cos x\) is (-3).

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फलन \(2+\sin x\) का परिसर क्या है?

What is the range of the function \(2+\sin x\)?

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C. ([1,3])

Explanation

Simple Explanation

\(\sin x\) का परिसर ([-1,1]) है। (2) जोड़ने पर परिसर ([1,3]) हो जाता है। / The range of \(\sin x\) is ([-1,1]). Adding (2) changes the range to ([1,3]).

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फलन \(1-\cos x\) का परिसर क्या है?

What is the range of the function \(1-\cos x\)?

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Correct Answer

B. ([0,2])

Explanation

Simple Explanation

\(\cos x\) का मान ([-1,1]) में होता है। इसलिए \(1-\cos x\) का परिसर ([0,2]) है। / The value of \(\cos x\) lies in ([-1,1]). Therefore, the range of \(1-\cos x\) is ([0,2]).

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\(\frac{\sin x+\cos x}{\sin x-\cos x}\) में यदि \(\tan x=3\), तो मान क्या है?

If \(\tan x=3\), what is the value of \(\frac{\sin x+\cos x}{\sin x-\cos x}\)?

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Correct Answer

A. (2)

Explanation

Simple Explanation

अंश और हर को \(\cos x\) से भाग देने पर \(\frac{\tan x+1}{\tan x-1}\) मिलता है। \(\tan x=3\) रखने पर मान (2) है। / Dividing numerator and denominator by \(\cos x\) gives \(\frac{\tan x+1}{\tan x-1}\). Substituting \(\tan x=3\) gives (2).

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\(\frac{\sec x+\tan x}{\sec x-\tan x}\) में यदि \(\sec x=2\) और \(\tan x=\sqrt{3}\), तो मान क्या है?

If \(\sec x=2\) and \(\tan x=\sqrt{3}\), what is the value of \(\frac{\sec x+\tan x}{\sec x-\tan x}\)?

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A. \(7+4\sqrt{3}\)

Explanation

Simple Explanation

मान \(\frac{2+\sqrt{3}}{2-\sqrt{3}}\) है। हर को परिमेय करने पर \(7+4\sqrt{3}\) मिलता है। / The value is \(\frac{2+\sqrt{3}}{2-\sqrt{3}}\). Rationalising the denominator gives \(7+4\sqrt{3}\).

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यदि \(\sec x+\tan x=5\), तो \(\sec x-\tan x\) का मान क्या है?

If \(\sec x+\tan x=5\), what is the value of \(\sec x-\tan x\)?

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Correct Answer

B. \(\frac{1}{5}\)

Explanation

Simple Explanation

क्योंकि (\(\sec x+\tan x\)\(\sec x-\tan x\)=1)। इसलिए दूसरा गुणनखंड \(\frac{1}{5}\) होगा। / Since (\(\sec x+\tan x\)\(\sec x-\tan x\)=1). Therefore, the other factor is \(\frac{1}{5}\).

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यदि \(\cosec x-\cot x=\frac{1}{3}\), तो \(\cosec x+\cot x\) का मान क्या है?

If \(\cosec x-\cot x=\frac{1}{3}\), what is the value of \(\cosec x+\cot x\)?

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Correct Answer

B. (3)

Explanation

Simple Explanation

क्योंकि (\(\cosec x-\cot x\)\(\cosec x+\cot x\)=1)। इसलिए \(\cosec x+\cot x=3\)। / Since (\(\cosec x-\cot x\)\(\cosec x+\cot x\)=1). Hence \(\cosec x+\cot x=3\).

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\(\sin^4 x-\cos^4 x\) का सरल मान क्या है?

What is the simplified value of \(\sin^4 x-\cos^4 x\)?

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Correct Answer

C. \(\sin^2 x-\cos^2 x\)

Explanation

Simple Explanation

इसे (\(\sin^2 x-\cos^2 x\)\(\sin^2 x+\cos^2 x\)) लिखें। दूसरा गुणनखंड (1) है। / Write it as (\(\sin^2 x-\cos^2 x\)\(\sin^2 x+\cos^2 x\)). The second factor is (1).

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\(\frac{1+\tan^2 x}{1+\cot^2 x}\) का सरल मान क्या है?

What is the simplified value of \(\frac{1+\tan^2 x}{1+\cot^2 x}\)?

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Correct Answer

A. \(\tan^2 x\)

Explanation

Simple Explanation

ऊपर \(1+\tan^2 x=\sec^2 x\) और नीचे \(1+\cot^2 x=\cosec^2 x\) है। अनुपात \(\frac{\sec^2 x}{\cosec^2 x}=\tan^2 x\) होता है। / The numerator is \(1+\tan^2 x=\sec^2 x\) and the denominator is \(1+\cot^2 x=\cosec^2 x\). Their ratio is \(\frac{\sec^2 x}{\cosec^2 x}=\tan^2 x\).

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\(\frac{1+\sin x}{1-\sin x}\) को \(\sec x\) और \(\tan x\) के रूप में किसके बराबर लिखा जा सकता है?

How can \(\frac{1+\sin x}{1-\sin x}\) be written in terms of \(\sec x\) and \(\tan x\)?

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Correct Answer

B. (\(\sec x+\tan x\)2)

Explanation

Simple Explanation

हर को परिमेय करने पर (\frac{\(1+\sin x\)2}{\cos-2 x}) मिलता है। यह (\(\sec x+\tan x\)2) के बराबर है। / Rationalising the denominator gives (\frac{\(1+\sin x\)2}{\cos-2 x}). This equals (\(\sec x+\tan x\)2).

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\(\frac{1-\cos x}{1+\cos x}\) किसके बराबर है?

What is \(\frac{1-\cos x}{1+\cos x}\) equal to?

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Correct Answer

C. \(\tan^2 \frac{x}{2}\)

Explanation

Simple Explanation

अर्ध कोण पहचान के अनुसार \(\tan^2 \frac{x}{2}=\frac{1-\cos x}{1+\cos x}\)। अर्ध कोण रूपों को अलग से याद रखें। / By the half-angle identity, \(\tan^2 \frac{x}{2}=\frac{1-\cos x}{1+\cos x}\). Remember half-angle forms separately.

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\(\frac{\sin x}{1+\cos x}\) किसके बराबर है?

What is \(\frac{\sin x}{1+\cos x}\) equal to?

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Correct Answer

B. \(\tan \frac{x}{2}\)

Explanation

Simple Explanation

मानक अर्ध कोण पहचान \(\tan \frac{x}{2}=\frac{\sin x}{1+\cos x}\) है। ऐसे रूप में अर्ध कोण तुरंत पहचानें। / The standard half-angle identity is \(\tan \frac{x}{2}=\frac{\sin x}{1+\cos x}\). Identify the half-angle form quickly.

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यदि \(\sin x+\cos x=\frac{3}{2}\), तो (\(\sin x-\cos x\)2) का मान क्या है?

If \(\sin x+\cos x=\frac{3}{2}\), what is the value of (\(\sin x-\cos x\)2)?

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Correct Answer

B. \(\frac{7}{4}\)

Explanation

Simple Explanation

पहले (\(\sin x+\cos x\)2=1+2\sin x\cos x) से \(\sin x\cos x=\frac{5}{8}\) मिलता है। फिर (\(\sin x-\cos x\)2=1-2\sin x\cos x=\frac{7}{4})। / First, (\(\sin x+\cos x\)2=1+2\sin x\cos x) gives \(\sin x\cos x=\frac{5}{8}\). Then (\(\sin x-\cos x\)2=1-2\sin x\cos x=\frac{7}{4}).

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यदि \(\sin x-\cos x=\frac{1}{2}\), तो \(\sin x\cos x\) का मान क्या है?

If \(\sin x-\cos x=\frac{1}{2}\), what is the value of \(\sin x\cos x\)?

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A. \(\frac{3}{8}\)

Explanation

Simple Explanation

(\(\sin x-\cos x\)2=1-2\sin x\cos x) लगाएँ। इससे \(\sin x\cos x=\frac{3}{8}\) मिलता है। / Use (\(\sin x-\cos x\)2=1-2\sin x\cos x). This gives \(\sin x\cos x=\frac{3}{8}\).

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यदि \(\sin x+\cos x=\frac{6}{5}\), तो \(\sin x-\cos x\) के वर्ग का मान क्या है?

If \(\sin x+\cos x=\frac{6}{5}\), what is the value of the square of \(\sin x-\cos x\)?

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C. \(\frac{14}{25}\)

Explanation

Simple Explanation

पहचान (\(\sin x+\cos x\)2+\(\sin x-\cos x\)2=2) का उपयोग करें। इसलिए मान \(2-\frac{36}{25}=\frac{14}{25}\) है। / Use the identity (\(\sin x+\cos x\)2+\(\sin x-\cos x\)2=2). Hence the value is \(2-\frac{36}{25}=\frac{14}{25}\).

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यदि \(\tan x+\cot x=5\), तो \(\tan^2 x+\cot^2 x\) का मान क्या है?

If \(\tan x+\cot x=5\), what is the value of \(\tan^2 x+\cot^2 x\)?

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Correct Answer

B. (23)

Explanation

Simple Explanation

(\(\tan x+\cot x\)2=\tan-2 x+\cot-2 x+2) होता है। इसलिए मान (25-2=23) है। / (\(\tan x+\cot x\)2=\tan-2 x+\cot-2 x+2). Therefore, the value is (25-2=23).

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यदि \(\sec x-\tan x=\frac{1}{4}\), तो \(\sec x+\tan x\) का मान क्या है?

If \(\sec x-\tan x=\frac{1}{4}\), what is the value of \(\sec x+\tan x\)?

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Correct Answer

C. (4)

Explanation

Simple Explanation

क्योंकि (\(\sec x-\tan x\)\(\sec x+\tan x\)=1) होता है। इसलिए दूसरा गुणनखंड (4) होगा। / Since (\(\sec x-\tan x\)\(\sec x+\tan x\)=1). Hence the other factor is (4).

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यदि \(\cosec x+\cot x=6\), तो \(\cosec x-\cot x\) का मान क्या है?

If \(\cosec x+\cot x=6\), what is the value of \(\cosec x-\cot x\)?

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A. \(\frac{1}{6}\)

Explanation

Simple Explanation

(\(\cosec x+\cot x\)\(\cosec x-\cot x\)=1) होता है। इसलिए आवश्यक मान \(\frac{1}{6}\) है। / The identity is (\(\cosec x+\cot x\)\(\cosec x-\cot x\)=1). Therefore, the required value is \(\frac{1}{6}\).

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\(\frac{\sin x}{1-\cos x}\) किसके बराबर है?

What is \(\frac{\sin x}{1-\cos x}\) equal to?

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Correct Answer

B. \(\cot \frac{x}{2}\)

Explanation

Simple Explanation

अर्ध-कोण पहचान से \(\frac{\sin x}{1-\cos x}=\cot \frac{x}{2}\) होता है। ऐसे रूपों में हर देखकर पहचान करें। / By the half-angle identity, \(\frac{\sin x}{1-\cos x}=\cot \frac{x}{2}\). In such forms, identify the denominator carefully.

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\(\frac{1+\cos x}{\sin x}\) किसके बराबर है?

What is \(\frac{1+\cos x}{\sin x}\) equal to?

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Correct Answer

C. \(\cot \frac{x}{2}\)

Explanation

Simple Explanation

मानक अर्ध-कोण रूप \(\cot \frac{x}{2}=\frac{1+\cos x}{\sin x}\) है। \(\tan \frac{x}{2}\) और \(\cot \frac{x}{2}\) के रूप अलग रखें। / The standard half-angle form is \(\cot \frac{x}{2}=\frac{1+\cos x}{\sin x}\). Keep the forms of \(\tan \frac{x}{2}\) and \(\cot \frac{x}{2}\) separate.

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फलन \(4-3\sin x\) का अधिकतम मान क्या है?

What is the maximum value of the function \(4-3\sin x\)?

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Correct Answer

C. (7)

Explanation

Simple Explanation

\(\sin x\) का न्यूनतम मान (-1) है। इसलिए अधिकतम मान (4-3(-1)=7) होगा। / The minimum value of \(\sin x\) is (-1). Hence the maximum value is (4-3(-1)=7).

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फलन \(2+5\cos x\) का न्यूनतम मान क्या है?

What is the minimum value of the function \(2+5\cos x\)?

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Correct Answer

A. -(3)

Explanation

Simple Explanation

\(\cos x\) का न्यूनतम मान (-1) होता है। इसलिए न्यूनतम मान (2+5(-1)=-3) है। / The minimum value of \(\cos x\) is (-1). Therefore, the minimum value is (2+5(-1)=-3).

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फलन \(3\sin 2x-1\) का परिसर क्या है?

What is the range of the function \(3\sin 2x-1\)?

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Correct Answer

B. ([-4,2])

Explanation

Simple Explanation

\(\sin 2x\) का परिसर ([-1,1]) है। (3) से गुणा और (-1) जोड़ने पर परिसर ([-4,2]) मिलता है। / The range of \(\sin 2x\) is ([-1,1]). Multiplying by (3) and adding (-1) gives ([-4,2]).

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फलन \(2\cos 3x+4\) का काल क्या है?

What is the period of the function \(2\cos 3x+4\)?

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B. \(\frac{2\pi}{3}\)

Explanation

Simple Explanation

ऊर्ध्व बदलाव और आयाम काल नहीं बदलते। \(\cos 3x\) का काल \(\frac{2\pi}{3}\) है। / Vertical shift and amplitude do not change the period. The period of \(\cos 3x\) is \(\frac{2\pi}{3}\).

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फलन (\tan(2x)) का मूल काल क्या है?

What is the fundamental period of the function (\tan(2x))?

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A. \(\frac{\pi}{2}\)

Explanation

Simple Explanation

\(\tan kx\) का काल \(\frac{\pi}{k}\) होता है। यहाँ (k=2), इसलिए मूल काल \(\frac{\pi}{2}\) है। / The period of \(\tan kx\) is \(\frac{\pi}{k}\). Here (k=2), so the fundamental period is \(\frac{\pi}{2}\).

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यदि (x) दूसरे चतुर्थांश में है और \(\cos x=-\frac{3}{5}\), तो \(\tan x\) का मान क्या है?

If (x) is in the second quadrant and \(\cos x=-\frac{3}{5}\), what is the value of \(\tan x\)?

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Correct Answer

B. -\(\frac{4}{3}\)

Explanation

Simple Explanation

दूसरे चतुर्थांश में \(\sin x\) धनात्मक और \(\cos x\) ऋणात्मक होता है। \(\sin x=\frac{4}{5}\), इसलिए \(\tan x=-\frac{4}{3}\) है। / In the second quadrant, \(\sin x\) is positive and \(\cos x\) is negative. Since \(\sin x=\frac{4}{5}\), \(\tan x=-\frac{4}{3}\).

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यदि (x) तीसरे चतुर्थांश में है और \(\sin x=-\frac{5}{13}\), तो \(\sec x\) का मान क्या है?

If (x) is in the third quadrant and \(\sin x=-\frac{5}{13}\), what is the value of \(\sec x\)?

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Correct Answer

B. -\(\frac{13}{12}\)

Explanation

Simple Explanation

तीसरे चतुर्थांश में \(\cos x\) ऋणात्मक होता है। \(\cos x=-\frac{12}{13}\), इसलिए \(\sec x=-\frac{13}{12}\) है। / In the third quadrant, \(\cos x\) is negative. Since \(\cos x=-\frac{12}{13}\), \(\sec x=-\frac{13}{12}\).

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यदि (x) चौथे चतुर्थांश में है और \(\tan x=-\frac{24}{7}\), तो \(\cos x\) का मान क्या है?

If (x) is in the fourth quadrant and \(\tan x=-\frac{24}{7}\), what is the value of \(\cos x\)?

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Correct Answer

A. \(\frac{7}{25}\)

Explanation

Simple Explanation

चौथे चतुर्थांश में \(\cos x\) धनात्मक और \(\sin x\) ऋणात्मक होता है। (7,24,25) त्रिक से \(\cos x=\frac{7}{25}\) है। / In the fourth quadrant, \(\cos x\) is positive and \(\sin x\) is negative. From the (7,24,25) triple, \(\cos x=\frac{7}{25}\).

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यदि (x) दूसरे चतुर्थांश में है और \(\sec x=-\frac{17}{8}\), तो \(\sin x\) का मान क्या है?

If (x) is in the second quadrant and \(\sec x=-\frac{17}{8}\), what is the value of \(\sin x\)?

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Correct Answer

C. \(\frac{15}{17}\)

Explanation

Simple Explanation

\(\cos x=-\frac{8}{17}\) होगा। दूसरे चतुर्थांश में \(\sin x\) धनात्मक है, इसलिए \(\sin x=\frac{15}{17}\) है। / \(\cos x=-\frac{8}{17}\). In the second quadrant, \(\sin x\) is positive, so \(\sin x=\frac{15}{17}\).

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(\sin\(2\pi-x\)) किसके बराबर है?

What is (\sin\(2\pi-x\)) equal to?

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Correct Answer

B. -\(\sin x\)

Explanation

Simple Explanation

\(2\pi-x\) चौथे चतुर्थांश से संबंधित है। वहाँ \(\sin x\) ऋणात्मक होता है, इसलिए (\sin\(2\pi-x\)=-\sin x)। / \(2\pi-x\) is related to the fourth quadrant. There \(\sin x\) is negative, so (\sin\(2\pi-x\)=-\sin x).

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(\cos\(2\pi-x\)) किसके बराबर है?

What is (\cos\(2\pi-x\)) equal to?

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Correct Answer

C. \(\cos x\)

Explanation

Simple Explanation

\(2\pi-x\) चौथे चतुर्थांश में आता है और \(\cos x\) धनात्मक रहता है। इसलिए (\cos\(2\pi-x\)=\cos x)। / \(2\pi-x\) lies in the fourth quadrant and \(\cos x\) remains positive. Hence (\cos\(2\pi-x\)=\cos x).

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(\tan\(2\pi-x\)) किसके बराबर है?

What is (\tan\(2\pi-x\)) equal to?

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Correct Answer

B. -\(\tan x\)

Explanation

Simple Explanation

चौथे चतुर्थांश में \(\tan x\) ऋणात्मक होता है। इसलिए (\tan\(2\pi-x\)=-\tan x)। / In the fourth quadrant, \(\tan x\) is negative. Therefore, (\tan\(2\pi-x\)=-\tan x).

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(\sin\(\frac{3\pi}{2}+x\)) किसके बराबर है?

What is (\sin\(\frac{3\pi}{2}+x\)) equal to?

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Correct Answer

A. -\(\cos x\)

Explanation

Simple Explanation

\(\frac{3\pi}{2}+x\) रूप में \(\sin\) बदलकर \(\cos\) होता है और चिन्ह ऋणात्मक होता है। इसलिए उत्तर \(-\cos x\) है। / In the form \(\frac{3\pi}{2}+x\), \(\sin\) changes to \(\cos\) with a negative sign. Hence the answer is \(-\cos x\).

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(\cos\(\frac{3\pi}{2}-x\)) किसके बराबर है?

What is (\cos\(\frac{3\pi}{2}-x\)) equal to?

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Correct Answer

C. -\(\sin x\)

Explanation

Simple Explanation

\(\frac{3\pi}{2}-x\) तीसरे चतुर्थांश से जुड़ा है। \(\cos\) बदलकर \(\sin\) होता है और चिन्ह ऋणात्मक रहता है। / \(\frac{3\pi}{2}-x\) is related to the third quadrant. \(\cos\) changes to \(\sin\) with a negative sign.

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(\tan\(\frac{3\pi}{2}+x\)) किसके बराबर है?

What is (\tan\(\frac{3\pi}{2}+x\)) equal to?

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Correct Answer

C. -\(\cot x\)

Explanation

Simple Explanation

\(\frac{3\pi}{2}+x\) पर \(\tan\) बदलकर \(\cot\) होता है और चिन्ह ऋणात्मक है। इसलिए (\tan\(\frac{3\pi}{2}+x\)=-\cot x)। / At \(\frac{3\pi}{2}+x\), \(\tan\) changes to \(\cot\) with a negative sign. Hence (\tan\(\frac{3\pi}{2}+x\)=-\cot x).

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(\frac{\sin\(\pi-x\)}{\cos\(\pi+x\)}) का सरल मान क्या है?

What is the simplified value of (\frac{\sin\(\pi-x\)}{\cos\(\pi+x\)})?

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Correct Answer

A. -\(\tan x\)

Explanation

Simple Explanation

(\sin\(\pi-x\)=\sin x) और (\cos\(\pi+x\)=-\cos x) होता है। इसलिए भिन्न \(-\tan x\) है। / (\sin\(\pi-x\)=\sin x) and (\cos\(\pi+x\)=-\cos x). Therefore, the fraction is \(-\tan x\).

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(\frac{\cos\(2\pi-x\)}{\sin\(\pi+x\)}) का सरल मान क्या है?

What is the simplified value of (\frac{\cos\(2\pi-x\)}{\sin\(\pi+x\)})?

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Correct Answer

B. -\(\cot x\)

Explanation

Simple Explanation

(\cos\(2\pi-x\)=\cos x) और (\sin\(\pi+x\)=-\sin x) है। इसलिए मान \(-\cot x\) है। / (\cos\(2\pi-x\)=\cos x) and (\sin\(\pi+x\)=-\sin x). Hence the value is \(-\cot x\).

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\(\sec^2 x+\cosec^2 x\) को \(\tan x\) और \(\cot x\) के रूप में कैसे लिखा जा सकता है?

How can \(\sec^2 x+\cosec^2 x\) be written in terms of \(\tan x\) and \(\cot x\)?

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B. \(2+\tan^2 x+\cot^2 x\)

Explanation

Simple Explanation

\(\sec^2 x=1+\tan^2 x\) और \(\cosec^2 x=1+\cot^2 x\) लगाएँ। योग \(2+\tan^2 x+\cot^2 x\) होगा। / Use \(\sec^2 x=1+\tan^2 x\) and \(\cosec^2 x=1+\cot^2 x\). The sum becomes \(2+\tan^2 x+\cot^2 x\).

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\(\frac{\tan x+\cot x}{\sec x\cosec x}\) का सरल मान क्या है?

What is the simplified value of \(\frac{\tan x+\cot x}{\sec x\cosec x}\)?

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Correct Answer

A. (1)

Explanation

Simple Explanation

\(\tan x+\cot x=\frac{1}{\sin x\cos x}\) और \(\sec x\cosec x=\frac{1}{\sin x\cos x}\) होता है। इसलिए अनुपात (1) है। / \(\tan x+\cot x=\frac{1}{\sin x\cos x}\) and \(\sec x\cosec x=\frac{1}{\sin x\cos x}\). Hence the ratio is (1).

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\(\frac{\sec x}{\tan x}\) का सरल मान क्या है?

What is the simplified value of \(\frac{\sec x}{\tan x}\)?

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Correct Answer

B. \(\cosec x\)

Explanation

Simple Explanation

\(\sec x=\frac{1}{\cos x}\) और \(\tan x=\frac{\sin x}{\cos x}\) रखें। अनुपात \(\frac{1}{\sin x}=\cosec x\) बनता है। / Put \(\sec x=\frac{1}{\cos x}\) and \(\tan x=\frac{\sin x}{\cos x}\). The ratio becomes \(\frac{1}{\sin x}=\cosec x\).

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\(\frac{\cosec x}{\cot x}\) का सरल मान क्या है?

What is the simplified value of \(\frac{\cosec x}{\cot x}\)?

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Correct Answer

B. \(\sec x\)

Explanation

Simple Explanation

\(\cosec x=\frac{1}{\sin x}\) और \(\cot x=\frac{\cos x}{\sin x}\) रखें। अनुपात \(\frac{1}{\cos x}=\sec x\) होगा। / Put \(\cosec x=\frac{1}{\sin x}\) and \(\cot x=\frac{\cos x}{\sin x}\). The ratio becomes \(\frac{1}{\cos x}=\sec x\).

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(\sin-2 x\(1+\cot^2 x\)) का सरल मान क्या है?

What is the simplified value of (\sin-2 x\(1+\cot^2 x\))?

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Correct Answer

B. (1)

Explanation

Simple Explanation

क्योंकि \(1+\cot^2 x=\cosec^2 x\)। इसलिए \(\sin^2 x\cosec^2 x=1\) होगा। / Since \(1+\cot^2 x=\cosec^2 x\). Therefore, \(\sin^2 x\cosec^2 x=1\).

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(\cos-2 x\(1+\tan^2 x\)) का सरल मान क्या है?

What is the simplified value of (\cos-2 x\(1+\tan^2 x\))?

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Correct Answer

C. (1)

Explanation

Simple Explanation

क्योंकि \(1+\tan^2 x=\sec^2 x\)। इसलिए \(\cos^2 x\sec^2 x=1\) है। / Since \(1+\tan^2 x=\sec^2 x\). Therefore, \(\cos^2 x\sec^2 x=1\).

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यदि \(\tan x=\frac{1}{2}\), तो \(\frac{1-\tan^2 x}{1+\tan^2 x}\) का मान क्या है?

If \(\tan x=\frac{1}{2}\), what is the value of \(\frac{1-\tan^2 x}{1+\tan^2 x}\)?

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B. \(\frac{3}{5}\)

Explanation

Simple Explanation

\(\tan^2 x=\frac{1}{4}\) रखें। तब मान \(\frac{1-\frac{1}{4}}{1+\frac{1}{4}}=\frac{3}{5}\) है। / Put \(\tan^2 x=\frac{1}{4}\). Then the value is \(\frac{1-\frac{1}{4}}{1+\frac{1}{4}}=\frac{3}{5}\).

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यदि \(\cot x=\frac{3}{2}\), तो \(\frac{\cot^2 x-1}{\cot^2 x+1}\) का मान क्या है?

If \(\cot x=\frac{3}{2}\), what is the value of \(\frac{\cot^2 x-1}{\cot^2 x+1}\)?

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A. \(\frac{5}{13}\)

Explanation

Simple Explanation

\(\cot^2 x=\frac{9}{4}\) रखकर सरल करें। मान \(\frac{\frac{9}{4}-1}{\frac{9}{4}+1}=\frac{5}{13}\) है। / Substitute \(\cot^2 x=\frac{9}{4}\) and simplify. The value is \(\frac{\frac{9}{4}-1}{\frac{9}{4}+1}=\frac{5}{13}\).

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\(\sin^4 x+\cos^4 x\) किसके बराबर है?

What is \(\sin^4 x+\cos^4 x\) equal to?

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Correct Answer

B. \(1-2\sin^2 x\cos^2 x\)

Explanation

Simple Explanation

(\sin-4 x+\cos-4 x=\(\sin^2 x+\cos^2 x\)2-2\sin-2 x\cos-2 x) लिखें। पहला वर्ग (1) है। / Write (\sin-4 x+\cos-4 x=\(\sin^2 x+\cos^2 x\)2-2\sin-2 x\cos-2 x). The first square is (1).

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यदि \(\sin x\cos x=\frac{1}{4}\), तो \(\sin^4 x+\cos^4 x\) का मान क्या है?

If \(\sin x\cos x=\frac{1}{4}\), what is the value of \(\sin^4 x+\cos^4 x\)?

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Correct Answer

A. \(\frac{7}{8}\)

Explanation

Simple Explanation

पहचान \(\sin^4 x+\cos^4 x=1-2\sin^2 x\cos^2 x\) लगाएँ। \(\sin^2 x\cos^2 x=\frac{1}{16}\), इसलिए मान \(\frac{7}{8}\) है। / Use \(\sin^4 x+\cos^4 x=1-2\sin^2 x\cos^2 x\). Since \(\sin^2 x\cos^2 x=\frac{1}{16}\), the value is \(\frac{7}{8}\).

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यदि \(\sin x+\cos x=\sqrt{3}\), तो \(\tan x+\cot x\) का मान क्या है?

If \(\sin x+\cos x=\sqrt{3}\), what is the value of \(\tan x+\cot x\)?

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Correct Answer

C. (4)

Explanation

Simple Explanation

वर्ग करने पर \(1+2\sin x\cos x=3\), इसलिए \(\sin x\cos x=1\) मिलता है। फिर \(\tan x+\cot x=\frac{1}{\sin x\cos x}\), इसलिए मान (1) नहीं बल्कि विकल्पों में कोई सही नहीं होता। / Squaring gives \(1+2\sin x\cos x=3\), so \(\sin x\cos x=1\). Then \(\tan x+\cot x=\frac{1}{\sin x\cos x}\), so the value is (1), but none of the options is correct.

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यदि \(\sin x+\cos x=\frac{7}{5}\), तो \(\tan x+\cot x\) का मान क्या है?

If \(\sin x+\cos x=\frac{7}{5}\), what is the value of \(\tan x+\cot x\)?

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Correct Answer

B. \(\frac{25}{12}\)

Explanation

Simple Explanation

वर्ग करने पर \(1+2\sin x\cos x=\frac{49}{25}\), इसलिए \(\sin x\cos x=\frac{12}{25}\)। अब \(\tan x+\cot x=\frac{1}{\sin x\cos x}=\frac{25}{12}\)। / Squaring gives \(1+2\sin x\cos x=\frac{49}{25}\), so \(\sin x\cos x=\frac{12}{25}\). Now \(\tan x+\cot x=\frac{1}{\sin x\cos x}=\frac{25}{12}\).

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यदि \(\sin x-\cos x=\frac{1}{3}\), तो \(\tan x+\cot x\) का मान क्या है?

If \(\sin x-\cos x=\frac{1}{3}\), what is the value of \(\tan x+\cot x\)?

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Correct Answer

A. \(\frac{9}{4}\)

Explanation

Simple Explanation

वर्ग करने पर \(1-2\sin x\cos x=\frac{1}{9}\) मिलता है। इसलिए \(\sin x\cos x=\frac{4}{9}\) और \(\tan x+\cot x=\frac{9}{4}\)। / Squaring gives \(1-2\sin x\cos x=\frac{1}{9}\). Thus \(\sin x\cos x=\frac{4}{9}\) and \(\tan x+\cot x=\frac{9}{4}\).

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यदि \(\sec x+\tan x=3\), तो \(\sec x\) का मान क्या है?

If \(\sec x+\tan x=3\), what is the value of \(\sec x\)?

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Correct Answer

A. \(\frac{5}{3}\)

Explanation

Simple Explanation

क्योंकि \(\sec x-\tan x=\frac{1}{3}\) होगा। दोनों समीकरण जोड़ने पर \(2\sec x=3+\frac{1}{3}\), इसलिए \(\sec x=\frac{5}{3}\)। / Since \(\sec x-\tan x=\frac{1}{3}\). Adding both equations gives \(2\sec x=3+\frac{1}{3}\), so \(\sec x=\frac{5}{3}\).

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यदि \(\cosec x+\cot x=4\), तो \(\cot x\) का मान क्या है?

If \(\cosec x+\cot x=4\), what is the value of \(\cot x\)?

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Correct Answer

B. \(\frac{15}{8}\)

Explanation

Simple Explanation

\(\cosec x-\cot x=\frac{1}{4}\) होगा। घटाने पर \(2\cot x=4-\frac{1}{4}\), इसलिए \(\cot x=\frac{15}{8}\)। / \(\cosec x-\cot x=\frac{1}{4}\). Subtracting gives \(2\cot x=4-\frac{1}{4}\), so \(\cot x=\frac{15}{8}\).

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\(\frac{1}{1+\sin x}+\frac{1}{1-\sin x}\) का सरल मान क्या है?

What is the simplified value of \(\frac{1}{1+\sin x}+\frac{1}{1-\sin x}\)?

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Correct Answer

A. \(2\sec^2 x\)

Explanation

Simple Explanation

हरों को मिलाने पर \(\frac{2}{1-\sin^2 x}\) मिलेगा। यह \(\frac{2}{\cos^2 x}=2\sec^2 x\) है। / Combining denominators gives \(\frac{2}{1-\sin^2 x}\). This is \(\frac{2}{\cos^2 x}=2\sec^2 x\).

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\(\frac{1}{1+\cos x}+\frac{1}{1-\cos x}\) का सरल मान क्या है?

What is the simplified value of \(\frac{1}{1+\cos x}+\frac{1}{1-\cos x}\)?

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Correct Answer

C. \(2\cosec^2 x\)

Explanation

Simple Explanation

हरों को मिलाने पर \(\frac{2}{1-\cos^2 x}\) मिलता है। यह \(\frac{2}{\sin^2 x}=2\cosec^2 x\) है। / Combining denominators gives \(\frac{2}{1-\cos^2 x}\). This is \(\frac{2}{\sin^2 x}=2\cosec^2 x\).

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\(\frac{1}{\sec x+\tan x}\) किसके बराबर है?

What is \(\frac{1}{\sec x+\tan x}\) equal to?

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Correct Answer

B. \(\sec x-\tan x\)

Explanation

Simple Explanation

क्योंकि (\(\sec x+\tan x\)\(\sec x-\tan x\)=1)। इसलिए व्युत्क्रम \(\sec x-\tan x\) होगा। / Since (\(\sec x+\tan x\)\(\sec x-\tan x\)=1). Therefore, the reciprocal is \(\sec x-\tan x\).

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\(\frac{1}{\cosec x-\cot x}\) किसके बराबर है?

What is \(\frac{1}{\cosec x-\cot x}\) equal to?

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Correct Answer

C. \(\cosec x+\cot x\)

Explanation

Simple Explanation

क्योंकि (\(\cosec x-\cot x\)\(\cosec x+\cot x\)=1)। इसलिए आवश्यक व्युत्क्रम \(\cosec x+\cot x\) है। / Since (\(\cosec x-\cot x\)\(\cosec x+\cot x\)=1). Hence the required reciprocal is \(\cosec x+\cot x\).

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फलन \(6-2\sin 4x\) का आयाम क्या है?

What is the amplitude of the function \(6-2\sin 4x\)?

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Correct Answer

C. (2)

Explanation

Simple Explanation

आयाम गुणांक के परिमाण के बराबर होता है। यहाँ \(\sin 4x\) का गुणांक (-2) है, इसलिए आयाम (2) है। / Amplitude equals the absolute value of the coefficient. Here the coefficient of \(\sin 4x\) is (-2), so the amplitude is (2).

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फलन (5\cos\(\frac{x}{2}\)) का काल क्या है?

What is the period of the function (5\cos\(\frac{x}{2}\))?

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Correct Answer

C. \(4\pi\)

Explanation

Simple Explanation

\(\cos kx\) का काल \(\frac{2\pi}{k}\) होता है। यहाँ \(k=\frac{1}{2}\), इसलिए काल \(4\pi\) है। / The period of \(\cos kx\) is \(\frac{2\pi}{k}\). Here \(k=\frac{1}{2}\), so the period is \(4\pi\).

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फलन \(\sin^2 x\) का मूल काल क्या है?

What is the fundamental period of the function \(\sin^2 x\)?

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Correct Answer

B. \(\pi\)

Explanation

Simple Explanation

(\sin-2\(x+\pi\)=\sin-2 x) होता है। इसलिए \(\sin^2 x\) का मूल काल \(\pi\) है। / (\sin-2\(x+\pi\)=\sin-2 x). Hence the fundamental period of \(\sin^2 x\) is \(\pi\).

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फलन \(\cos^2 x\) का परिसर क्या है?

What is the range of the function \(\cos^2 x\)?

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Correct Answer

C. ([0,1])

Explanation

Simple Explanation

\(\cos x\) का मान ([-1,1]) में होता है। वर्ग करने पर परिसर ([0,1]) बनता है। / The value of \(\cos x\) lies in ([-1,1]). Squaring gives the range ([0,1]).

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यदि \(\sec x-\tan x=\frac{2}{5}\), तो \(\tan x\) का मान क्या है?

If \(\sec x-\tan x=\frac{2}{5}\), what is the value of \(\tan x\)?

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Correct Answer

A. \(\frac{21}{20}\)

Explanation

Simple Explanation

क्योंकि (\(\sec x-\tan x\)\(\sec x+\tan x\)=1), इसलिए \(\sec x+\tan x=\frac{5}{2}\)। दोनों समीकरण घटाने पर \(\tan x=\frac{21}{20}\) मिलता है। / Since (\(\sec x-\tan x\)\(\sec x+\tan x\)=1), \(\sec x+\tan x=\frac{5}{2}\). Subtracting the two equations gives \(\tan x=\frac{21}{20}\).

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\(\frac{\sin x-\sin^3 x}{\cos^2 x}\) का सरल मान क्या है?

What is the simplified value of \(\frac{\sin x-\sin^3 x}{\cos^2 x}\)?

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Correct Answer

C. \(\sin x\)

Explanation

Simple Explanation

अंश को (\sin x\(1-\sin^2 x\)) लिखें। क्योंकि \(1-\sin^2 x=\cos^2 x\), इसलिए मान \(\sin x\) है। / Write the numerator as (\sin x\(1-\sin^2 x\)). Since \(1-\sin^2 x=\cos^2 x\), the value is \(\sin x\).

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फलन \(2-4\cos^2 x\) का परिसर क्या है?

What is the range of the function \(2-4\cos^2 x\)?

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Correct Answer

B. ([-2,2])

Explanation

Simple Explanation

\(\cos^2 x\) का परिसर ([0,1]) है। इसलिए \(2-4\cos^2 x\) का परिसर ([-2,2]) होगा। / The range of \(\cos^2 x\) is ([0,1]). Therefore, the range of \(2-4\cos^2 x\) is ([-2,2]).

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यदि (f\(\theta\)=\sin \theta+\cos \theta) है, तो (f\left\(\frac{\pi}{2}-\theta\right\)) किसके बराबर होगा?

If (f\(\theta\)=\sin \theta+\cos \theta), then (f\left\(\frac{\pi}{2}-\theta\right\)) is equal to what?

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Correct Answer

B. \(\sin \theta+\cos \theta\)

Explanation

Simple Explanation

क्योंकि पूरक कोणों में (\sin\left\(\frac{\pi}{2}-\theta\right\)=\cos \theta) और (\cos\left\(\frac{\pi}{2}-\theta\right\)=\sin \theta) होता है। परीक्षा में co-function सूत्र याद रखें। / Because for complementary angles ( \sin\left\(\frac{\pi}{2}-\theta\right\)=\cos \theta) and ( \cos\left\(\frac{\pi}{2}-\theta\right\)=\sin \theta). In exams remember co-function formulas.

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यदि \(\theta\) चतुर्थ चतुर्थांश में है, तो \(\sec \theta\) और \(\cosec \theta\) के चिन्ह कैसे होंगे?

If \(\theta\) is in the fourth quadrant, what are the signs of \(\sec \theta\) and \(\cosec \theta\)?

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Correct Answer

A. \(\sec \theta\) धनात्मक और \(\cosec \theta\) ऋणात्मक\(\sec \theta\) positive and \(\cosec \theta\) negative

Explanation

Simple Explanation

चतुर्थ चतुर्थांश में \(\cos \theta\) धनात्मक और \(\sin \theta\) ऋणात्मक होता है, इसलिए उनके व्युत्क्रमों के चिन्ह भी वैसे ही होंगे। परीक्षा में पहले मूल फलनों के चिन्ह तय करें। / In the fourth quadrant, \(\cos \theta\) is positive and \(\sin \theta\) is negative, so their reciprocals have the same signs. In exams decide the signs of basic functions first.

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यदि \(\tan \theta=3\) है, तो \(\frac{\sin \theta}{\cos \theta}\) का मान क्या होगा?

If \(\tan \theta=3\), what is the value of \(\frac{\sin \theta}{\cos \theta}\)?

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Correct Answer

B. (3)

Explanation

Simple Explanation

\(\tan \theta=\frac{\sin \theta}{\cos \theta}\) होता है। परीक्षा में परिभाषा सीधे लागू करें। / \( \tan \theta=\frac{\sin \theta}{\cos \theta}\). In exams apply the definition directly.

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(\tan\(5\pi+\theta\)) किसके बराबर है?

What is (\tan\(5\pi+\theta\)) equal to?

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Correct Answer

C. \(\tan \theta\)

Explanation

Simple Explanation

\(\tan \theta\) का मूल period \(\pi\) है और \(5\pi\) period का गुणज है, इसलिए मान नहीं बदलता। परीक्षा में tangent में \(\pi\) के गुणज को हटाकर सरल करें। / The fundamental period of \(\tan \theta\) is \(\pi\), and \(5\pi\) is a multiple of the period, so the value does not change. In exams simplify tangent by removing multiples of \(\pi\).

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यदि \(\sin^2 \theta+\cos^2 \theta=k\) है, तो (k) का मान क्या है?

If \(\sin^2 \theta+\cos^2 \theta=k\), what is the value of (k)?

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Correct Answer

C. (1)

Explanation

Simple Explanation

मूल सर्वसमिका \(\sin^2 \theta+\cos^2 \theta=1\) है। परीक्षा में इसे सबसे पहले जांचें। / The basic identity is \( \sin^2 \theta+\cos^2 \theta=1\). In exams check this first.

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\(\sec^2 \theta-\tan^2 \theta\) का सरल मान क्या है?

What is the simplified value of \(\sec^2 \theta-\tan^2 \theta\)?

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Correct Answer

A. (1)

Explanation

Simple Explanation

\(\sec^2 \theta=1+\tan^2 \theta\) से अंतर (1) मिलता है। परीक्षा में identity को rearrange करें। / From \( \sec^2 \theta=1+\tan^2 \theta\), the difference is (1). In exams rearrange the identity.

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यदि \(\theta\) प्रथम चतुर्थांश में है और \(\sin \theta=\frac{5}{13}\), तो \(\cos \theta\) का मान क्या होगा?

If \(\theta\) is in the first quadrant and \(\sin \theta=\frac{5}{13}\), what is \(\cos \theta\)?

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Correct Answer

A. \(\frac{12}{13}\)

Explanation

Simple Explanation

\(\cos^2 \theta=1-\sin^2 \theta=\frac{144}{169}\) और प्रथम चतुर्थांश में मान धनात्मक है। परीक्षा में quadrant sign न भूलें। / \( \cos^2 \theta=1-\sin^2 \theta=\frac{144}{169}\), and in the first quadrant it is positive. In exams do not forget quadrant sign.

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यदि \(\theta\) द्वितीय चतुर्थांश में है और \(\cos \theta=-\frac{3}{5}\), तो \(\sin \theta\) का मान क्या होगा?

If \(\theta\) is in the second quadrant and \(\cos \theta=-\frac{3}{5}\), what is \(\sin \theta\)?

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Correct Answer

B. \(\frac{4}{5}\)

Explanation

Simple Explanation

\(\sin^2 \theta=1-\cos^2 \theta=\frac{16}{25}\) और द्वितीय चतुर्थांश में \(\sin \theta\) धनात्मक है। परीक्षा में ASTC नियम काम आता है। / \( \sin^2 \theta=1-\cos^2 \theta=\frac{16}{25}\), and \(\sin \theta\) is positive in the second quadrant. In exams ASTC rule helps.

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यदि (\tan\(-\theta\)=m), तो (m) किसके बराबर है?

If (\tan\(-\theta\)=m), then (m) equals what?

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Correct Answer

B. \(-\tan \theta\)

Explanation

Simple Explanation

\(\tan \theta\) विषम फलन है इसलिए (\tan\(-\theta\)=-\tan \theta)। परीक्षा में sign बदलने पर ध्यान दें। / \( \tan \theta\) is an odd function, so ( \tan\(-\theta\)=-\tan \theta). In exams focus on sign change.

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(\sin\(\pi-\theta\)) का मान क्या है?

What is the value of (\sin\(\pi-\theta\))?

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Correct Answer

C. \(\sin \theta\)

Explanation

Simple Explanation

\(\pi-\theta\) द्वितीय चतुर्थांश में आता है और sine धनात्मक रहता है। परीक्षा में allied angle formula याद रखें। / \( \pi-\theta\) lies in the second quadrant and sine remains positive. In exams remember allied angle formulas.

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(\cos\(\pi-\theta\)) का मान क्या है?

What is the value of (\cos\(\pi-\theta\))?

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Correct Answer

A. \(-\cos \theta\)

Explanation

Simple Explanation

\(\pi-\theta\) द्वितीय चतुर्थांश में है जहां cosine ऋणात्मक होता है। परीक्षा में चतुर्थांश का चिन्ह जरूर लगाएं। / \( \pi-\theta\) is in the second quadrant where cosine is negative. In exams always apply quadrant sign.

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(\tan\(\pi-\theta\)) का मान क्या होगा?

What is the value of (\tan\(\pi-\theta\))?

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Correct Answer

B. \(-\tan \theta\)

Explanation

Simple Explanation

\(\pi-\theta\) द्वितीय चतुर्थांश में है और tangent ऋणात्मक होता है। परीक्षा में tangent के sign पर विशेष ध्यान दें। / \( \pi-\theta\) is in the second quadrant and tangent is negative. In exams pay special attention to the sign of tangent.

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(\sin\(\pi+\theta\)) का मान क्या है?

What is the value of (\sin\(\pi+\theta\))?

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Correct Answer

B. \(-\sin \theta\)

Explanation

Simple Explanation

\(\pi+\theta\) तृतीय चतुर्थांश में है जहां sine ऋणात्मक होता है। परीक्षा में allied angle पहचानना जरूरी है। / \( \pi+\theta\) is in the third quadrant where sine is negative. In exams identifying allied angles is important.

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(\cos\(\pi+\theta\)) का मान क्या है?

What is the value of (\cos\(\pi+\theta\))?

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Correct Answer

C. \(-\cos \theta\)

Explanation

Simple Explanation

\(\pi+\theta\) तृतीय चतुर्थांश में है और cosine ऋणात्मक होता है। परीक्षा में sign table तुरंत याद करें। / \( \pi+\theta\) is in the third quadrant and cosine is negative. In exams recall the sign table quickly.

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(\tan\(\pi+\theta\)) का मान क्या है?

What is the value of (\tan\(\pi+\theta\))?

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Correct Answer

B. \(\tan \theta\)

Explanation

Simple Explanation

\(\tan \theta\) का period \(\pi\) है इसलिए (\tan\(\pi+\theta\)=\tan \theta)। परीक्षा में tangent की periodicity याद रखें। / The period of \( \tan \theta\) is \( \pi\), so ( \tan\(\pi+\theta\)=\tan \theta). In exams remember the periodicity of tangent.

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(\tan\(2\pi-\theta\)) का मान क्या होगा?

What is the value of (\tan\(2\pi-\theta\))?

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Correct Answer

B. \(-\tan \theta\)

Explanation

Simple Explanation

\(2\pi-\theta\) चतुर्थ चतुर्थांश में है जहां tangent ऋणात्मक होता है। परीक्षा में sine और cosine के sign से tangent निकालें। / \(2\pi-\theta\) is in the fourth quadrant where tangent is negative. In exams derive tangent from sine and cosine signs.

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यदि \(\sin \theta=0\), तो \(\theta\) का सामान्य हल क्या है?

If \(\sin \theta=0\), what is the general solution for \(\theta\)?

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Correct Answer

A. \(\theta=n\pi\)

Explanation

Simple Explanation

\(\sin \theta\) शून्य (0), \(\pi\), \(2\pi\) जैसे बिंदुओं पर होता है। परीक्षा में \(n\in\mathbb{Z}\) मानकर सामान्य हल लिखें। / \( \sin \theta\) is zero at points like (0), \(\pi\), and \(2\pi\). In exams write the general solution with \(n\in\mathbb{Z}\).

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यदि \(\cos \theta=0\), तो \(\theta\) का सामान्य हल क्या है?

If \(\cos \theta=0\), what is the general solution for \(\theta\)?

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Correct Answer

B. (\theta=\frac{(2n+1)\pi}{2})

Explanation

Simple Explanation

\(\cos \theta\) शून्य odd multiples of \(\frac{\pi}{2}\) पर होता है। परीक्षा में (\frac{(2n+1)\pi}{2}) पैटर्न याद रखें। / \( \cos \theta\) is zero at odd multiples of \( \frac{\pi}{2}\). In exams remember the pattern ( \frac{(2n+1)\pi}{2}).

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\(\tan \theta=0\) का सामान्य हल क्या है?

What is the general solution of \(\tan \theta=0\)?

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Correct Answer

A. \(\theta=n\pi\)

Explanation

Simple Explanation

\(\tan \theta=0\) तब होता है जब \(\sin \theta=0\) और \(\cos \theta\neq0\)। परीक्षा में tangent का period \(\pi\) रखें। / \( \tan \theta=0\) occurs when \( \sin \theta=0\) and \( \cos \theta\neq0\). In exams use period \( \pi\) for tangent.

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यदि \(\sin \theta=\sin \alpha\), तो सामान्य हल कौन सा है?

If \(\sin \theta=\sin \alpha\), which is the general solution?

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Correct Answer

A. (\theta=n\pi+(-1)^n\alpha)

Explanation

Simple Explanation

\(\sin \theta=\sin \alpha\) का संयुक्त हल (\theta=n\pi+(-1)^n\alpha) होता है। परीक्षा में दो अलग हलों को एक सूत्र में लिखना सीखें। / The combined solution of \( \sin \theta=\sin \alpha\) is ( \theta=n\pi+(-1)^n\alpha). In exams learn to write two cases in one formula.

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यदि \(\cos \theta=\cos \alpha\), तो सामान्य हल कौन सा है?

If \(\cos \theta=\cos \alpha\), which is the general solution?

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Correct Answer

B. \(\theta=2n\pi\pm\alpha\)

Explanation

Simple Explanation

\(\cos \theta=\cos \alpha\) के लिए दोनों दिशाओं में कोण मिलते हैं। परीक्षा में \(\pm\alpha\) लगाना न भूलें। / For \( \cos \theta=\cos \alpha\), angles occur in both directions. In exams do not forget \( \pm\alpha\).

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यदि \(\tan \theta=\tan \alpha\), तो सामान्य हल क्या है?

If \(\tan \theta=\tan \alpha\), what is the general solution?

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Correct Answer

B. \(\theta=n\pi+\alpha\)

Explanation

Simple Explanation

\(\tan \theta\) का period \(\pi\) है इसलिए हल \(\theta=n\pi+\alpha\) होगा। परीक्षा में tangent equations में \(\pi\) period लगाएं। / The period of \( \tan \theta\) is \( \pi\), so the solution is \( \theta=n\pi+\alpha\). In exams use period \( \pi\) for tangent equations.

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(\tan\left\(\frac{\pi}{2}-\theta\right\)) का मान क्या है?

What is the value of (\tan\left\(\frac{\pi}{2}-\theta\right\))?

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Correct Answer

C. \(\cot \theta\)

Explanation

Simple Explanation

\(\frac{\pi}{2}-\theta\) पर tangent का co-function cotangent होता है। परीक्षा में complementary angle property याद रखें। / At \( \frac{\pi}{2}-\theta\), tangent changes to its co-function cotangent. In exams remember complementary angle property.

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(\cot\left\(\frac{\pi}{2}-\theta\right\)) किसके बराबर है?

What is (\cot\left\(\frac{\pi}{2}-\theta\right\)) equal to?

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Correct Answer

D. \(\tan \theta\)

Explanation

Simple Explanation

\(\frac{\pi}{2}-\theta\) पर cotangent का co-function tangent होता है। परीक्षा में reciprocal function pair याद रखें। / At \( \frac{\pi}{2}-\theta\), cotangent changes to the co-function tangent. In exams remember reciprocal function pairs.

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यदि \(\sin \theta=\cos \theta\) और \(0<\theta<\frac{\pi}{2}\), तो \(\theta\) का मान क्या है?

If \(\sin \theta=\cos \theta\) and \(0<\theta<\frac{\pi}{2}\), what is the value of \(\theta\)?

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Correct Answer

C. \(\frac{\pi}{4}\)

Explanation

Simple Explanation

\(\sin \theta=\cos \theta\) से \(\tan \theta=1\) और प्रथम चतुर्थांश में \(\theta=\frac{\pi}{4}\) है। परीक्षा में दोनों तरफ \(\cos \theta\) से भाग तभी दें जब वह शून्य न हो। / From \( \sin \theta=\cos \theta\), \( \tan \theta=1\), and in the first quadrant \( \theta=\frac{\pi}{4}\). In exams divide by \( \cos \theta\) only when it is nonzero.

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यदि \(\sin \theta=\frac{1}{2}\) और \(0<\theta<\pi\), तो \(\theta\) के मान कौन से हैं?

If \(\sin \theta=\frac{1}{2}\) and \(0<\theta<\pi\), what are the values of \(\theta\)?

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Correct Answer

A. \(\frac{\pi}{6},\frac{5\pi}{6}\)

Explanation

Simple Explanation

\(\sin \theta=\frac{1}{2}\) के reference angle \(\frac{\pi}{6}\) हैं और sine प्रथम व द्वितीय चतुर्थांश में धनात्मक है। परीक्षा में दिए interval में ही उत्तर चुनें। / The reference angle for \( \sin \theta=\frac{1}{2}\) is \( \frac{\pi}{6}\), and sine is positive in the first and second quadrants. In exams choose only answers in the given interval.

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यदि \(\cos \theta=\frac{1}{2}\) और \(0<\theta<2\pi\), तो \(\theta\) के मान कौन से हैं?

If \(\cos \theta=\frac{1}{2}\) and \(0<\theta<2\pi\), what are the values of \(\theta\)?

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Correct Answer

A. \(\frac{\pi}{3},\frac{5\pi}{3}\)

Explanation

Simple Explanation

\(\cos \theta=\frac{1}{2}\) के लिए reference angle \(\frac{\pi}{3}\) है और cosine प्रथम व चतुर्थ चतुर्थांश में धनात्मक है। परीक्षा में \(2\pi\) तक के दोनों हल लिखें। / For \( \cos \theta=\frac{1}{2}\), the reference angle is \( \frac{\pi}{3}\), and cosine is positive in the first and fourth quadrants. In exams write both solutions up to \(2\pi\).

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यदि \(\tan \theta=\sqrt{3}\) और \(0<\theta<\pi\), तो \(\theta\) का मान क्या होगा?

If \(\tan \theta=\sqrt{3}\) and \(0<\theta<\pi\), what is the value of \(\theta\)?

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Correct Answer

B. \(\frac{\pi}{3}\)

Explanation

Simple Explanation

\(\tan \theta=\sqrt{3}\) का reference angle \(\frac{\pi}{3}\) है और \(0<\theta<\pi\) में tangent प्रथम चतुर्थांश में धनात्मक है। परीक्षा में sign के अनुसार quadrant चुनें। / The reference angle for \( \tan \theta=\sqrt{3}\) is \( \frac{\pi}{3}\), and in \(0<\theta<\pi\) tangent is positive in the first quadrant. In exams choose the quadrant by sign.

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\(\frac{1-\cos^2 \theta}{\sin^2 \theta}\) का सरल मान क्या है, जब \(\sin \theta\neq0\)?

What is the simplified value of \(\frac{1-\cos^2 \theta}{\sin^2 \theta}\), when \(\sin \theta\neq0\)?

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Correct Answer

B. (1)

Explanation

Simple Explanation

क्योंकि \(1-\cos^2 \theta=\sin^2 \theta\), इसलिए अनुपात (1) है। परीक्षा में denominator condition जरूर देखें। / Because \(1-\cos^2 \theta=\sin^2 \theta\), the ratio is (1). In exams always check the denominator condition.

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\(\frac{1-\sin^2 \theta}{\cos^2 \theta}\) का सरल मान क्या है, जब \(\cos \theta\neq0\)?

What is the simplified value of \(\frac{1-\sin^2 \theta}{\cos^2 \theta}\), when \(\cos \theta\neq0\)?

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Correct Answer

C. (1)

Explanation

Simple Explanation

क्योंकि \(1-\sin^2 \theta=\cos^2 \theta\), इसलिए मान (1) होगा। परीक्षा में basic identity से numerator बदलें। / Because \(1-\sin^2 \theta=\cos^2 \theta\), the value is (1). In exams replace the numerator using the basic identity.

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यदि \(\tan \theta=\frac{4}{3}\) और \(\theta\) प्रथम चतुर्थांश में है, तो \(\sin \theta\) का मान क्या है?

If \(\tan \theta=\frac{4}{3}\) and \(\theta\) is in the first quadrant, what is \(\sin \theta\)?

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Correct Answer

B. \(\frac{4}{5}\)

Explanation

Simple Explanation

\(\tan \theta=\frac{4}{3}\) में opposite (4), adjacent (3), hypotenuse (5) होगा। परीक्षा में Pythagorean triplet पहचानें। / In \( \tan \theta=\frac{4}{3}\), opposite is (4), adjacent is (3), and hypotenuse is (5). In exams identify Pythagorean triplets.

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यदि \(\cot \theta=\frac{12}{5}\) और \(\theta\) प्रथम चतुर्थांश में है, तो \(\cos \theta\) का मान क्या है?

If \(\cot \theta=\frac{12}{5}\) and \(\theta\) is in the first quadrant, what is \(\cos \theta\)?

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Correct Answer

B. \(\frac{12}{13}\)

Explanation

Simple Explanation

\(\cot \theta=\frac{12}{5}\) में adjacent (12), opposite (5), hypotenuse (13) है। \(परीक्षा में (\cos \theta=\frac{\)adjacent}{hypotenuse}) लगाएं। \(/ In ( \cot \theta=\frac{12}{5}), adjacent is (12), opposite is (5), and hypotenuse is (13). In exams use ( \cos \theta=\frac{\)adjacent}{hypotenuse}).

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यदि \(\sec \theta=2\) और \(\theta\) प्रथम चतुर्थांश में है, तो \(\cos \theta\) का मान क्या है?

If \(\sec \theta=2\) and \(\theta\) is in the first quadrant, what is \(\cos \theta\)?

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Correct Answer

B. \(\frac{1}{2}\)

Explanation

Simple Explanation

\(\sec \theta=\frac{1}{\cos \theta}\), इसलिए \(\cos \theta=\frac{1}{2}\) है। परीक्षा में reciprocal relations याद रखें। / \( \sec \theta=\frac{1}{\cos \theta}\), so \( \cos \theta=\frac{1}{2}\). In exams remember reciprocal relations.

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यदि \(\cosec \theta=\frac{5}{2}\) और \(\theta\) प्रथम चतुर्थांश में है, तो \(\sin \theta\) का मान क्या है?

If \(\cosec \theta=\frac{5}{2}\) and \(\theta\) is in the first quadrant, what is \(\sin \theta\)?

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Correct Answer

C. \(\frac{2}{5}\)

Explanation

Simple Explanation

\(\cosec \theta=\frac{1}{\sin \theta}\), इसलिए \(\sin \theta=\frac{2}{5}\) है। परीक्षा में cosecant और sine reciprocal हैं। / \( \cosec \theta=\frac{1}{\sin \theta}\), so \( \sin \theta=\frac{2}{5}\). In exams remember cosecant and sine are reciprocals.

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\(\sin \theta \cdot \cosec \theta\) का मान क्या है, जब दोनों परिभाषित हों?

What is the value of \(\sin \theta \cdot \cosec \theta\), when both are defined?

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Correct Answer

B. (1)

Explanation

Simple Explanation

\(\cosec \theta=\frac{1}{\sin \theta}\) इसलिए गुणनफल (1) है। परीक्षा में defined condition को नजरअंदाज न करें। / \( \cosec \theta=\frac{1}{\sin \theta}\), so the product is (1). In exams do not ignore the defined condition.

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\(\cos \theta \cdot \sec \theta\) का मान क्या है, जब दोनों परिभाषित हों?

What is the value of \(\cos \theta \cdot \sec \theta\), when both are defined?

Explanation opens after your attempt
Correct Answer

B. (1)

Explanation

Simple Explanation

\(\sec \theta=\frac{1}{\cos \theta}\) होने से गुणनफल (1) बनता है। परीक्षा में reciprocal pair तुरंत पहचानें। / Since \( \sec \theta=\frac{1}{\cos \theta}\), the product becomes (1). In exams identify reciprocal pairs quickly.

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\(\tan \theta \cdot \cot \theta\) का मान क्या है, जब दोनों परिभाषित हों?

What is the value of \(\tan \theta \cdot \cot \theta\), when both are defined?

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Correct Answer

C. (1)

Explanation

Simple Explanation

\(\cot \theta=\frac{1}{\tan \theta}\), इसलिए गुणनफल (1) है। परीक्षा में reciprocal formulas से समय बचता है। / \( \cot \theta=\frac{1}{\tan \theta}\), so the product is (1). In exams reciprocal formulas save time.

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यदि (\sin \theta+\sin\(-\theta\)=p), तो (p) का मान क्या है?

If (\sin \theta+\sin\(-\theta\)=p), what is the value of (p)?

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Correct Answer

B. (0)

Explanation

Simple Explanation

(\sin\(-\theta\)=-\sin \theta), इसलिए दोनों पद कट जाते हैं। परीक्षा में odd function property से ऐसे प्रश्न जल्दी हल होते हैं। / ( \sin\(-\theta\)=-\sin \theta), so both terms cancel. In exams odd function property solves such questions quickly.

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यदि (\cos \theta-\cos\(-\theta\)=q), तो (q) का मान क्या है?

If (\cos \theta-\cos\(-\theta\)=q), what is the value of (q)?

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Correct Answer

A. (0)

Explanation

Simple Explanation

(\cos\(-\theta\)=\cos \theta), इसलिए अंतर (0) है। परीक्षा में even function property ध्यान रखें। / ( \cos\(-\theta\)=\cos \theta), so the difference is (0). In exams keep the even function property in mind.

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यदि (\tan \theta+\tan\(\pi-\theta\)=r), तो (r) का मान क्या है?

If (\tan \theta+\tan\(\pi-\theta\)=r), what is the value of (r)?

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Correct Answer

C. (0)

Explanation

Simple Explanation

(\tan\(\pi-\theta\)=-\tan \theta), इसलिए योग (0) होता है। परीक्षा में allied angle sign से उत्तर तुरंत मिलता है। / ( \tan\(\pi-\theta\)=-\tan \theta), so the sum is (0). In exams allied angle sign gives the answer quickly.

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\(\sin^2 \theta-\cos^2 \theta\) किसके बराबर है?

What is \(\sin^2 \theta-\cos^2 \theta\) equal to?

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Correct Answer

B. \(-\cos 2\theta\)

Explanation

Simple Explanation

क्योंकि \(\cos 2\theta=\cos^2 \theta-\sin^2 \theta\), इसलिए दिया गया रूप \(-\cos 2\theta\) है। परीक्षा में double angle identities को उल्टा भी पढ़ें। / Because \( \cos 2\theta=\cos^2 \theta-\sin^2 \theta\), the given form is \(-\cos 2\theta\). In exams read double angle identities in reverse too.

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यदि \(\sin \theta+\cos \theta=\sqrt{2}\) और \(0<\theta<\frac{\pi}{2}\), तो \(\theta\) का मान क्या है?

If \(\sin \theta+\cos \theta=\sqrt{2}\) and \(0<\theta<\frac{\pi}{2}\), what is the value of \(\theta\)?

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Correct Answer

B. \(\frac{\pi}{4}\)

Explanation

Simple Explanation

प्रथम चतुर्थांश में \(\sin \theta+\cos \theta\) का अधिकतम \(\sqrt{2}\) \(\theta=\frac{\pi}{4}\) पर होता है। परीक्षा में symmetry का उपयोग करें। / In the first quadrant, the maximum of \( \sin \theta+\cos \theta\) is \( \sqrt{2}\) at \( \theta=\frac{\pi}{4}\). In exams use symmetry.

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\(\sin \theta+\cos \theta\) का अधिकतम मान क्या है?

What is the maximum value of \(\sin \theta+\cos \theta\)?

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Correct Answer

B. \(\sqrt{2}\)

Explanation

Simple Explanation

(\sin \theta+\cos \theta=\sqrt{2}\sin\left\(\theta+\frac{\pi}{4}\right\)), इसलिए अधिकतम \(\sqrt{2}\) है। परीक्षा में \(a\sin x+b\cos x\) का maximum \(\sqrt{a^2+b^2}\) लें। / ( \sin \theta+\cos \theta=\sqrt{2}\sin\left\(\theta+\frac{\pi}{4}\right\)), so the maximum is \( \sqrt{2}\). In exams use maximum of \(a\sin x+b\cos x\) as \( \sqrt{a^2+b^2}\).

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\(\sin \theta-\cos \theta\) का न्यूनतम मान क्या है?

What is the minimum value of \(\sin \theta-\cos \theta\)?

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A. \(-\sqrt{2}\)

Explanation

Simple Explanation

\(\sin \theta-\cos \theta\) का amplitude (\sqrt{12+(-1)2}=\sqrt{2}) है। परीक्षा में minimum हमेशा negative amplitude होगा। / The amplitude of \( \sin \theta-\cos \theta\) is ( \sqrt{12+(-1)2}=\sqrt{2}). In exams the minimum is the negative amplitude.

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यदि \(3\sin \theta+4\cos \theta\) का अधिकतम मान (M) है, तो (M) क्या है?

If the maximum value of \(3\sin \theta+4\cos \theta\) is (M), what is (M)?

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Correct Answer

A. (5)

Explanation

Simple Explanation

\(a\sin \theta+b\cos \theta\) का अधिकतम \(\sqrt{a^2+b^2}\) होता है, इसलिए (M=5)। परीक्षा में coefficients का square जोड़ें। / The maximum of \(a\sin \theta+b\cos \theta\) is \( \sqrt{a^2+b^2}\), so (M=5). In exams add the squares of coefficients.

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यदि \(5\cos \theta-12\sin \theta\) का न्यूनतम मान (m) है, तो (m) क्या है?

If the minimum value of \(5\cos \theta-12\sin \theta\) is (m), what is (m)?

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Correct Answer

B. (-13)

Explanation

Simple Explanation

Amplitude (\sqrt{52+(-12)2}=13) है, इसलिए न्यूनतम (-13) होगा। परीक्षा में maximum positive और minimum negative amplitude होता है। / The amplitude is ( \sqrt{52+(-12)2}=13), so the minimum is (-13). In exams maximum is positive amplitude and minimum is negative amplitude.

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यदि \(\theta\) तृतीय चतुर्थांश में है, तो \(\sin \theta\) और \(\cos \theta\) के चिन्ह कैसे होंगे?

If \(\theta\) is in the third quadrant, what are the signs of \(\sin \theta\) and \(\cos \theta\)?

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B. \(\sin \theta\) ऋणात्मक और \(\cos \theta\) ऋणात्मक\(\sin \theta\) negative and \(\cos \theta\) negative

Explanation

Simple Explanation

तृतीय चतुर्थांश में sine और cosine दोनों ऋणात्मक होते हैं। परीक्षा में ASTC नियम से signs जल्दी तय करें। / In the third quadrant, both sine and cosine are negative. In exams use the ASTC rule to decide signs quickly.

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\(\sin 3\theta\) का मूल period क्या है?

What is the fundamental period of \(\sin 3\theta\)?

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Correct Answer

A. \(\frac{2\pi}{3}\)

Explanation

Simple Explanation

\(\sin k\theta\) का period \(\frac{2\pi}{k}\) होता है, इसलिए यहां \(\frac{2\pi}{3}\) मिलेगा। परीक्षा में coefficient को period formula में लगाएं। / The period of \( \sin k\theta\) is \( \frac{2\pi}{k}\), so here it is \( \frac{2\pi}{3}\). In exams use the coefficient in the period formula.

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यदि \(\cos \theta=-1\), तो \(\theta\) का सामान्य हल क्या है?

If \(\cos \theta=-1\), what is the general solution for \(\theta\)?

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Correct Answer

B. (\theta=(2n+1)\pi)

Explanation

Simple Explanation

\(\cos \theta=-1\) विषम गुणजों of \(\pi\) पर होता है। परीक्षा में \(\cos \theta=1\) और \(\cos \theta=-1\) के हल अलग पहचानें। / \( \cos \theta=-1\) occurs at odd multiples of \( \pi\). In exams distinguish the solutions of \( \cos \theta=1\) and \( \cos \theta=-1\).

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(\cos\(4\theta\)) का मूल period क्या है?

What is the fundamental period of (\cos\(4\theta\))?

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Correct Answer

A. \(\frac{\pi}{2}\)

Explanation

Simple Explanation

\(\cos k\theta\) का मूल period \(\frac{2\pi}{k}\) होता है, इसलिए यहां \(\frac{\pi}{2}\) मिलेगा। परीक्षा में coefficient को denominator में रखें। / The fundamental period of \( \cos k\theta\) is \( \frac{2\pi}{k}\), so here it is \( \frac{\pi}{2}\). In exams put the coefficient in the denominator.

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