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Class 11 Mathematics Medium Quiz

Level 70 • 50/50 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 \(\sin x\)?

Explanation opens after your attempt
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 \(\sec x\)?

Explanation opens after your attempt
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 \(\cosec x\)?

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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 \(\frac{\sec^2 x-1}{\tan^2 x}\)?

Explanation opens after your attempt
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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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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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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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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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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FAQs

Class 11 Mathematics Quiz FAQs

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