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Class 12 Mathematics Medium Quiz

Level 31 • 50/50 questions • 35 seconds per question.

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मुख्य मान शाखा में (\sin^{-1}\left\(\frac{1}{2}\right\)) का मान क्या है?

What is the value of (\sin^{-1}\left\(\frac{1}{2}\right\)) in the principal branch?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

\(\sin^{-1}x\) का परिसर \(\left[-\frac{\pi}{2},\frac{\pi}{2}\right]\) होता है और \(\sin\frac{\pi}{6}=\frac{1}{2}\)। परीक्षा में हमेशा मुख्य मान परिसर याद रखें। / The range of \(\sin^{-1}x\) is \(\left[-\frac{\pi}{2},\frac{\pi}{2}\right]\) and \(\sin\frac{\pi}{6}=\frac{1}{2}\). Always remember the principal range in exams.

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मुख्य मान शाखा में (\cos^{-1}\left\(-\frac{1}{2}\right\)) का मान क्या है?

What is the value of (\cos^{-1}\left\(-\frac{1}{2}\right\)) in the principal branch?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

\(\cos^{-1}x\) का परिसर \(\left[0,\pi\right]\) है और इस परिसर में \(\cos\frac{2\pi}{3}=-\frac{1}{2}\)। ऋणात्मक उत्तर को मुख्य मान न मानें। / The range of \(\cos^{-1}x\) is \(\left[0,\pi\right]\) and in this range \(\cos\frac{2\pi}{3}=-\frac{1}{2}\). Do not take a negative angle as principal value.

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मुख्य मान शाखा में (\tan^{-1}(-1)) का मान क्या है?

What is the value of (\tan^{-1}(-1)) in the principal branch?

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Correct Answer

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

Explanation

Simple Explanation

\(\tan^{-1}x\) का परिसर (\left\(-\frac{\pi}{2},\frac{\pi}{2}\right\)) है और (\tan\left\(-\frac{\pi}{4}\right\)=-1)। चतुर्थांश का ध्यान रखें। / The range of \(\tan^{-1}x\) is (\left\(-\frac{\pi}{2},\frac{\pi}{2}\right\)) and (\tan\left\(-\frac{\pi}{4}\right\)=-1). Keep the quadrant in mind.

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फलन \(\tan^{-1}x\) का परिसर क्या है?

What is the range of the function \(\tan^{-1}x\)?

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Correct Answer

C. (\left\(-\frac{\pi}{2},\frac{\pi}{2}\right\))

Explanation

Simple Explanation

\(\tan^{-1}x\) सभी वास्तविक (x) के लिए परिभाषित है लेकिन इसका परिसर खुला अंतराल (\left\(-\frac{\pi}{2},\frac{\pi}{2}\right\)) है। अंत बिंदु शामिल नहीं होते। / The function \(\tan^{-1}x\) is defined for all real (x) but its range is the open interval (\left\(-\frac{\pi}{2},\frac{\pi}{2}\right\)). The end points are not included.

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यदि \(y=\sin^{-1}x\), तो (x) और (y) के बीच सही संबंध कौन सा है?

If \(y=\sin^{-1}x\), which relation between (x) and (y) is correct?

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Correct Answer

A. \(x=\sin y,\ y\in\left[-\frac{\pi}{2},\frac{\pi}{2}\right]\)

Explanation

Simple Explanation

\(\sin^{-1}\) का अर्थ है वह कोण (y) जिसके लिए \(\sin y=x\)। साथ में मुख्य मान का परिसर भी जरूरी है। / The meaning of \(\sin^{-1}\) is the angle (y) for which \(\sin y=x\). The principal range must also be included.

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यदि \(y=\cos^{-1}x\), तो (y) किस अंतराल में होगा?

If \(y=\cos^{-1}x\), in which interval does (y) lie?

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Correct Answer

B. \(\left[0,\pi\right]\)

Explanation

Simple Explanation

\(\cos^{-1}x\) का मुख्य परिसर \(\left[0,\pi\right]\) है। \(\cos^{-1}\) में दोनों अंत बिंदु शामिल होते हैं। / The principal range of \(\cos^{-1}x\) is \(\left[0,\pi\right]\). Both end points are included for \(\cos^{-1}\).

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(\sin\left\(\sin^{-1}\frac{3}{5}\right\)) का मान क्या है?

What is the value of (\sin\left\(\sin^{-1}\frac{3}{5}\right\))?

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Correct Answer

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

Explanation

Simple Explanation

जब \(\frac{3}{5}\in\left[-1,1\right]\), तब (\sin\left\(\sin^{-1}x\right\)=x)। अंदर का मान प्रांत में है या नहीं पहले देखें। / When \(\frac{3}{5}\in\left[-1,1\right]\), (\sin\left\(\sin^{-1}x\right\)=x). First check whether the inside value lies in the domain.

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(\cos^{-1}\(\cos\frac{5\pi}{3}\)) का मुख्य मान क्या है?

What is the principal value of (\cos^{-1}\(\cos\frac{5\pi}{3}\))?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

\(\cos\frac{5\pi}{3}=\frac{1}{2}\) और \(\cos^{-1}\frac{1}{2}=\frac{\pi}{3}\)। कोण को हमेशा \(\left[0,\pi\right]\) में लाएं। / Since \(\cos\frac{5\pi}{3}=\frac{1}{2}\), \(\cos^{-1}\frac{1}{2}=\frac{\pi}{3}\). Always bring the angle into \(\left[0,\pi\right]\).

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\(\tan^{-1}(\tan\frac{3\pi}{4})\) का मुख्य मान क्या है?

What is the principal value of \(\tan^{-1}(\tan\frac{3\pi}{4})\)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

\(\tan\frac{3\pi}{4}=-1\) और \(\tan^{-1}(-1)=-\frac{\pi}{4}\)। उत्तर \(\left(-\frac{\pi}{2},\frac{\pi}{2}\right)\) में होना चाहिए। / Since \(\tan\frac{3\pi}{4}=-1), (\tan^{-1}(-1)=-\frac{\pi}{4}\). The answer must lie in \(\left(-\frac{\pi}{2},\frac{\pi}{2}\right)\).

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\(\sin^{-1}x+\cos^{-1}x\) का मान किसके बराबर है, जहाँ \(x\in\left[-1,1\right]\)?

What is \(\sin^{-1}x+\cos^{-1}x\) equal to, where \(x\in\left[-1,1\right]\)?

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Correct Answer

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

Explanation

Simple Explanation

मानक सर्वसमिका \(\sin^{-1}x+\cos^{-1}x=\frac{\pi}{2}\) है। इसे सबसे अधिक पूछे जाने वाले सूत्रों में रखें। / The standard identity is \(\sin^{-1}x+\cos^{-1}x=\frac{\pi}{2}\). Keep it among the most asked formulas.

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\(\tan^{-1}x+\cot^{-1}x\) का मान क्या है, जहाँ (x>0)?

What is \(\tan^{-1}x+\cot^{-1}x\), where (x>0)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

धनात्मक (x) के लिए \(\tan^{-1}x+\cot^{-1}x=\frac{\pi}{2}\) होता है। चिह्न बदलने पर सावधानी रखें। / For positive (x), \(\tan^{-1}x+\cot^{-1}x=\frac{\pi}{2}\). Be careful when the sign changes.

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(\csc^{-1}(-2)) का मुख्य मान क्या है?

What is the principal value of (\csc^{-1}(-2))?

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Correct Answer

A. \(-\frac{\pi}{6}\)

Explanation

Simple Explanation

\(\csc y=-2\) से \(\sin y=-\frac{1}{2}\), इसलिए मुख्य मान \(y=-\frac{\pi}{6}\) है। \(\csc^{-1}\) का परिसर याद रखें। / From \(\csc y=-2\), \(\sin y=-\frac{1}{2}\), so the principal value is \(y=-\frac{\pi}{6}\). Remember the range of \(\csc^{-1}\).

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(\sin^{-1}(-x)) किसके बराबर है?

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

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Correct Answer

A. \(-\sin^{-1}x\)

Explanation

Simple Explanation

\(\sin^{-1}x\) विषम फलन है, इसलिए (\sin^{-1}(-x)=-\sin^{-1}x)। विषम और सम गुणों को अलग रखें। / The function \(\sin^{-1}x\) is odd, so (\sin^{-1}(-x)=-\sin^{-1}x). Keep odd and even properties separate.

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(\cos^{-1}(-x)) किसके बराबर है, जहाँ \(x\in\left[-1,1\right]\)?

What is (\cos^{-1}(-x)) equal to, where \(x\in\left[-1,1\right]\)?

Explanation opens after your attempt
Correct Answer

C. \(\pi-\cos^{-1}x\)

Explanation

Simple Explanation

मानक संबंध (\cos^{-1}(-x)=\pi-\cos^{-1}x) है। इसे (\sin^{-1}(-x)) की तरह विषम न मानें। / The standard relation is (\cos^{-1}(-x)=\pi-\cos^{-1}x). Do not treat it as odd like (\sin^{-1}(-x)).

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(\tan^{-1}\(\sqrt{3}\)) का मान क्या है?

What is the value of (\tan^{-1}\(\sqrt{3}\))?

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Correct Answer

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

Explanation

Simple Explanation

\(\tan\frac{\pi}{3}=\sqrt{3}\) और \(\frac{\pi}{3}\) मुख्य परिसर में है। विशेष कोण याद रखना जरूरी है। / Since \(\tan\frac{\pi}{3}=\sqrt{3}\) and \(\frac{\pi}{3}\) lies in the principal range. Remember special angles well.

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\(\cos(\cos^{-1}(-\frac{3}{4}))\) का मान क्या है?

What is the value of \(\cos(\cos^{-1}(-\frac{3}{4}))\)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

यदि \(x\in\left[-1,1\right]\), तो \(\cos(\cos^{-1}x)=x\)। यहां \(x=-\frac{3}{4}\) प्रांत में है। / If \(x\in\left[-1,1\right]\), then \(\cos(\cos^{-1}x)=x\). Here \(x=-\frac{3}{4}\) lies in the domain.

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फलन \(\sec^{-1}x\) का प्रांत क्या है?

What is the domain of the function \(\sec^{-1}x\)?

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Correct Answer

B. (\mathbb{R}\setminus\left\(-1,1\right\))

Explanation

Simple Explanation

\(\sec y\) के मान (\left\(-1,1\right\)) में नहीं आते, इसलिए \(\sec^{-1}x\) का प्रांत (\mathbb{R}\setminus\left\(-1,1\right\)) है। शून्य भी प्रांत में नहीं है। / Values of \(\sec y\) do not lie in (\left\(-1,1\right\)), so the domain of \(\sec^{-1}x\) is (\mathbb{R}\setminus\left\(-1,1\right\)). Zero is also not in the domain.

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फलन \(\csc^{-1}x\) किस मान पर परिभाषित नहीं है?

At which value is the function \(\csc^{-1}x\) not defined?

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Correct Answer

C. \(x=\frac{1}{2}\)

Explanation

Simple Explanation

\(\csc^{-1}x\) के लिए \(\left|x\right|\ge 1\) चाहिए। इसलिए \(x=\frac{1}{2}\) अमान्य है। / For \(\csc^{-1}x\), we need \(\left|x\right|\ge 1\). Hence \(x=\frac{1}{2}\) is invalid.

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कौन सा व्यंजक वास्तविक संख्या के रूप में परिभाषित है?

Which expression is defined as a real number?

Explanation opens after your attempt
Correct Answer

C. \(\tan^{-1}5\)

Explanation

Simple Explanation

\(\tan^{-1}x\) सभी वास्तविक (x) के लिए परिभाषित है। बाकी विकल्पों में प्रांत की शर्त टूटती है। / The function \(\tan^{-1}x\) is defined for every real (x). In the other options the domain condition fails.

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यदि \(\theta=\cos^{-1}\left(\frac{8}{17}\right)\), तो \(\sin\theta\) का मान क्या है?

If \(\theta=\cos^{-1}\left(\frac{8}{17}\right)\), what is the value of \(\sin\theta\)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

\(\theta\in\left[0,\pi\right]\) और \(\cos\theta=\frac{8}{17}\), इसलिए \(\theta\) प्रथम चतुर्थांश में है और \(\sin\theta=\frac{15}{17}\)। त्रिभुज विधि तेज है। / Here \(\theta\in\left[0,\pi\right]\) and \(\cos\theta=\frac{8}{17}\), so \(\theta\) is in the first quadrant and \(\sin\theta=\frac{15}{17}\). The triangle method is fast.

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यदि \(\theta=\tan^{-1}\left(\frac{7}{24}\right)\), तो\ \(\sin\theta\\) का मान क्या है?

If \(\theta=\tan^{-1}\left(\frac{7}{24}\right)\), what is the value of \(\sin\theta\)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

\(\tan\theta=\frac{7}{24}\) से कर्ण \(\sqrt{7^2+24^2}=25\), इसलिए \(\sin\theta=\frac{7}{25}\)। अनुपात से त्रिभुज बनाएं। / From \(\tan\theta=\frac{7}{24}\), the hypotenuse is \(\sqrt{7^2+24^2}=25\), so \(\sin\theta=\frac{7}{25}\). Build a triangle from the ratio.

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\(\tan\left(\sin^{-1}\frac{4}{5}\right)\) का मान क्या है?

What is the value of \(\tan\left(\sin^{-1}\frac{4}{5}\right)\)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

मान लें \(\theta=\sin^{-1}\frac{4}{5}\), तब \(\sin\theta=\frac{4}{5}\) और \(\cos\theta=\frac{3}{5}\)। इसलिए \(\tan\theta=\frac{4}{3}\)। / Let \(\theta=\sin^{-1}\frac{4}{5}\), then \(\sin\theta=\frac{4}{5}\) and \(\cos\theta=\frac{3}{5}\). Therefore \(\tan\theta=\frac{4}{3}\).

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\(\sin\left(\tan^{-1}\frac{12}{5}\right)\) का मान क्या है?

What is the value of \(\sin\left(\tan^{-1}\frac{12}{5}\right)\)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

यदि \(\theta=\tan^{-1}\frac{12}{5}\), तो \(\tan\theta=\frac{12}{5}\) और कर्ण (13) है। इसलिए \(\sin\theta=\frac{12}{13}\)। / If \(\theta=\tan^{-1}\frac{12}{5}\), then \(\tan\theta=\frac{12}{5}\) and the hypotenuse is (13). Hence \(\sin\theta=\frac{12}{13}\).

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\(\cos\left(\tan^{-1}\frac{15}{8}\right)\) का मान क्या है?

What is the value of \(\cos\left(\tan^{-1}\frac{15}{8}\right)\)?

Explanation opens after your attempt
Correct Answer

B. \(\frac{8}{17}\)

Explanation

Simple Explanation

यदि \(\tan\theta=\frac{15}{8}\), तो कर्ण (17) है। मुख्य परिसर में \(\theta\) प्रथम चतुर्थांश में है, इसलिए \(\cos\theta=\frac{8}{17}\)। / If \(\tan\theta=\frac{15}{8}\), then the hypotenuse is (17). In the principal range \(\theta\) is in the first quadrant, so \(\cos\theta=\frac{8}{17}\).

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\(\tan^{-1}x\) के प्रांत और परिसर का सही युग्म कौन सा है?

Which pair gives the correct domain and range of \(\tan^{-1}x\)?

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Correct Answer

A. (\mathbb{R},\left\(-\frac{\pi}{2},\frac{\pi}{2}\right\))

Explanation

Simple Explanation

\(\tan^{-1}x\) का प्रांत \(\mathbb{R}\) और परिसर (\left\(-\frac{\pi}{2},\frac{\pi}{2}\right\)) है। खुले अंतराल के अंत बिंदु शामिल नहीं हैं। / The domain of \(\tan^{-1}x\) is \(\mathbb{R}\) and its range is (\left\(-\frac{\pi}{2},\frac{\pi}{2}\right\)). The endpoints of the open interval are not included.

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\(\cos^{-1}x\) किस अंतराल पर घटता हुआ फलन है?

On which interval is \(\cos^{-1}x\) a decreasing function?

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Correct Answer

A. \(\left[-1,1\right]\)

Explanation

Simple Explanation

\(\cos x\) को \(\left[0,\pi\right]\) पर एक-एक बनाने से \(\cos^{-1}x\) \(\left[-1,1\right]\) पर घटता है। ग्राफ की दिशा से भी पुष्टि करें। / By making \(\cos x\) one-one on \(\left[0,\pi\right]\), \(\cos^{-1}x\) becomes decreasing on \(\left[-1,1\right]\). The graph direction also confirms this.

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\(\sin^{-1}x\) किस अंतराल पर बढ़ता हुआ फलन है?

On which interval is \(\sin^{-1}x\) an increasing function?

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Correct Answer

A. \(\left[-1,1\right]\)

Explanation

Simple Explanation

\(\sin^{-1}x\) अपने पूरे प्रांत \(\left[-1,1\right]\) पर बढ़ता है। यह \(\sin x\) की चुनी गई शाखा से मिलता है। / The function \(\sin^{-1}x\) is increasing on its whole domain \(\left[-1,1\right]\). This matches the chosen branch of \(\sin x\).

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किस प्रतिबंधित अंतराल पर \(\sin x\) एक-एक और आच्छादक होकर \(\sin^{-1}x\) देता है?

On which restricted interval does \(\sin x\) become one-one and onto to give \(\sin^{-1}x\)?

Explanation opens after your attempt
Correct Answer

A. \(\left[-\frac{\pi}{2},\frac{\pi}{2}\right]\)

Explanation

Simple Explanation

\(\sin x\) को \(\left[-\frac{\pi}{2},\frac{\pi}{2}\right]\) पर प्रतिबंधित करने से यह एक-एक बनता है और मान \(\left[-1,1\right]\) मिलते हैं। इसी से \(\sin^{-1}x\) परिभाषित होता है। / Restricting \(\sin x\) to \(\left[-\frac{\pi}{2},\frac{\pi}{2}\right]\) makes it one-one and gives values \(\left[-1,1\right]\). This defines \(\sin^{-1}x\).

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किस प्रतिबंधित अंतराल पर \(\cos x\) का प्रतिलोम \(\cos^{-1}x\) परिभाषित किया जाता है?

On which restricted interval is the inverse \(\cos^{-1}x\) defined from \(\cos x\)?

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Correct Answer

B. \(\left[0,\pi\right]\)

Explanation

Simple Explanation

\(\cos x\) को \(\left[0,\pi\right]\) पर एक-एक बनाया जाता है। इसलिए \(\cos^{-1}x\) का परिसर \(\left[0,\pi\right]\) होता है। / The function \(\cos x\) is made one-one on \(\left[0,\pi\right]\). Therefore the range of \(\cos^{-1}x\) is \(\left[0,\pi\right]\).

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\(\sin^{-1}1+\cos^{-1}1\) का मान क्या है?

What is the value of \(\sin^{-1}1+\cos^{-1}1\)?

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Correct Answer

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

Explanation

Simple Explanation

\(\sin^{-1}1=\frac{\pi}{2}\) और \(\cos^{-1}1=0\), इसलिए योग \(\frac{\pi}{2}\) है। अंत बिंदुओं के मान याद रखें। / Here \(\sin^{-1}1=\frac{\pi}{2}\) and \(\cos^{-1}1=0\), so the sum is \(\frac{\pi}{2}\). Remember endpoint values.

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\(\cos^{-1}0-\sin^{-1}0\) का मान क्या है?

What is the value of \(\cos^{-1}0-\sin^{-1}0\)?

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Correct Answer

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

Explanation

Simple Explanation

\(\cos^{-1}0=\frac{\pi}{2}\) और \(\sin^{-1}0=0\), इसलिए अंतर \(\frac{\pi}{2}\) है। शून्य के उल्टे त्रिकोणमितीय मान बहुत उपयोगी हैं। / Since \(\cos^{-1}0=\frac{\pi}{2}\) and \(\sin^{-1}0=0\), the difference is \(\frac{\pi}{2}\). Inverse trigonometric values at zero are very useful.

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\(\tan^{-1}0+\cot^{-1}0\) का मान क्या है?

What is the value of \(\tan^{-1}0+\cot^{-1}0\)?

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Correct Answer

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

Explanation

Simple Explanation

\(\tan^{-1}0=0\) और \(\cot^{-1}0=\frac{\pi}{2}\), इसलिए योग \(\frac{\pi}{2}\) है। \(\cot^{-1}0\) को (0) न लिखें। / Here \(\tan^{-1}0=0\) and \(\cot^{-1}0=\frac{\pi}{2}\), so the sum is \(\frac{\pi}{2}\). Do not write \(\cot^{-1}0\) as (0).

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

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

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Correct Answer

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

Explanation

Simple Explanation

\(\sin^{-1}x=\frac{\pi}{4}\) से \(x=\sin\frac{\pi}{4}=\frac{1}{\sqrt{2}}\)। प्रतिलोम को सामान्य त्रिकोणमितीय रूप में बदलें। / From \(\sin^{-1}x=\frac{\pi}{4}\), \(x=\sin\frac{\pi}{4}=\frac{1}{\sqrt{2}}\). Convert the inverse form into the normal trigonometric form.

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

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

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Correct Answer

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

Explanation

Simple Explanation

\(\cos^{-1}x=\frac{2\pi}{3}\) से \(x=\cos\frac{2\pi}{3}=-\frac{1}{2}\)। कोण के चतुर्थांश से चिह्न तय करें। / From \(\cos^{-1}x=\frac{2\pi}{3}\), \(x=\cos\frac{2\pi}{3}=-\frac{1}{2}\). Decide the sign from the quadrant of the angle.

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यदि \(\tan^{-1}x=-\frac{\pi}{6}\), तो (x) का मान क्या है?

If \(\tan^{-1}x=-\frac{\pi}{6}\), what is the value of (x)?

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Correct Answer

B. \(-\frac{1}{\sqrt{3}}\)

Explanation

Simple Explanation

\(\tan^{-1}x=-\frac{\pi}{6}\) से (x=\tan\left\(-\frac{\pi}{6}\right\)=-\frac{1}{\sqrt{3}})। \(\tan^{-1}\) का परिसर ऋणात्मक कोण भी लेता है। / From \(\tan^{-1}x=-\frac{\pi}{6}\), (x=\tan\left\(-\frac{\pi}{6}\right\)=-\frac{1}{\sqrt{3}}). The range of \(\tan^{-1}\) also includes negative angles.

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\(\sin^{-1}\left(\frac{2}{3}\right)+\cos^{-1}\left(\frac{2}{3}\right)\) का मान क्या है?

What is the value of \(\sin^{-1}\left(\frac{2}{3}\right)+\cos^{-1}\left(\frac{2}{3}\right)\)?

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Correct Answer

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

Explanation

Simple Explanation

हर \(x\in\left[-1,1\right]\) के लिए \(\sin^{-1}x+\cos^{-1}x=\frac{\pi}{2}\)। यहां \(x=\frac{2}{3}\) मान्य है। / For every \(x\in\left[-1,1\right]\), \(\sin^{-1}x+\cos^{-1}x=\frac{\pi}{2}\). Here \(x=\frac{2}{3}\) is valid.

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यदि \(\alpha=\sin^{-1}\left(-\frac{\sqrt{3}}{2}\right)\), तो \(\alpha\) किसके बराबर है?

If \(\alpha=\sin^{-1}\left(-\frac{\sqrt{3}}{2}\right)\), what is \(\alpha\) equal to?

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Correct Answer

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

Explanation

Simple Explanation

\(\sin\left(-\frac{\pi}{3}\right)=-\frac{\sqrt{3}}{2}\) और यह मुख्य परिसर में है। इसलिए \(-\frac{\pi}{3}\) सही है। / Since \(\sin\left(-\frac{\pi}{3}\right)=-\frac{\sqrt{3}}{2}\) and it lies in the principal range. Therefore \(-\frac{\pi}{3}\) is correct.

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\(\cos^{-1}\left(\frac{\sqrt{2}}{2}\right)\) का मान क्या है?

What is the value of \(\cos^{-1}\left(\frac{\sqrt{2}}{2}\right)\)?

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Correct Answer

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

Explanation

Simple Explanation

\(\cos\frac{\pi}{4}=\frac{\sqrt{2}}{2}\) और \(\frac{\pi}{4}\in\left[0,\pi\right]\)। विशेष मानों की तालिका याद रखें। / Since \(\cos\frac{\pi}{4}=\frac{\sqrt{2}}{2}\) and \(\frac{\pi}{4}\in\left[0,\pi\right]\). Remember the table of special values.

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\(\sin^{-1}\left(\sin\left(-\frac{5\pi}{6}\right)\right)\) का मुख्य मान क्या है?

What is the principal value of \(\sin^{-1}\left(\sin\left(-\frac{5\pi}{6}\right)\right)\)?

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Correct Answer

B. \(-\frac{\pi}{6}\)

Explanation

Simple Explanation

\(\sin\left(-\frac{5\pi}{6}\right)=-\frac{1}{2}\), इसलिए \(\sin^{-1}\left(-\frac{1}{2}\right)=-\frac{\pi}{6}\)। उत्तर मुख्य परिसर में होना चाहिए। / Since \(\sin\left(-\frac{5\pi}{6}\right)=-\frac{1}{2}\), \(\sin^{-1}\left(-\frac{1}{2}\right)=-\frac{\pi}{6}\). The answer must lie in the principal range.

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यदि \(\beta=\cos^{-1}\left(-\frac{4}{5}\right)\), तो \(\sin\beta\) का मान क्या है?

If \(\beta=\cos^{-1}\left(-\frac{4}{5}\right)\), then what is the value of \(\sin\beta\)?

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Correct Answer

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

Explanation

Simple Explanation

\(\beta\in\left[0,\pi\right]\) और \(\cos\beta=-\frac{4}{5}\), इसलिए \(\beta\) द्वितीय चतुर्थांश में है और \(\sin\beta=\frac{3}{5}\)। \(\sin\) का चिह्न यहां धनात्मक है। / Here \(\beta\in\left[0,\pi\right]\) and \(\cos\beta=-\frac{4}{5}\), so \(\beta\) is in the second quadrant and \(\sin\beta=\frac{3}{5}\). The sign of \(\sin\) is positive here.

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यदि \(\theta=\cot^{-1}\left(\frac{3}{4}\right)\), तो \(\cos\theta\) का मान क्या है?

If \(\theta=\cot^{-1}\left(\frac{3}{4}\right)\), what is the value of \(\cos\theta\)?

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Correct Answer

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

Explanation

Simple Explanation

\(\cot\theta=\frac{3}{4}\) से आधार (3), लम्ब (4) और कर्ण (5) होगा। इसलिए \(\cos\theta=\frac{3}{5}\)। / From \(\cot\theta=\frac{3}{4}\), the base is (3), perpendicular is (4), and hypotenuse is (5). Hence \(\cos\theta=\frac{3}{5}\).

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\(\tan^{-1}\left(\frac{1}{2}\right)+\tan^{-1}\left(\frac{1}{3}\right)\) का मान क्या है?

What is the value of \(\tan^{-1}\left(\frac{1}{2}\right)+\tan^{-1}\left(\frac{1}{3}\right)\)?

Explanation opens after your attempt
Correct Answer

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

Explanation

Simple Explanation

सूत्र से योग \(\tan^{-1}\left(\frac{\frac{1}{2}+\frac{1}{3}}{1-\frac{1}{6}}\right)=\tan^{-1}1=\frac{\pi}{4}\) है। \(\tan^{-1}\) जोड़ते समय \(ab<1\) जांचें। / By the formula, the sum is \(\tan^{-1}\left(\frac{\frac{1}{2}+\frac{1}{3}}{1-\frac{1}{6}}\right)=\tan^{-1}1=\frac{\pi}{4}\). While adding \(\tan^{-1}\) terms, check \(ab<1\).

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(\sec^{-1}\(-\sqrt{2}\)) का मुख्य मान क्या है?

What is the principal value of (\sec^{-1}\(-\sqrt{2}\))?

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Correct Answer

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

Explanation

Simple Explanation

\(\sec y=-\sqrt{2}\) से \(\cos y=-\frac{1}{\sqrt{2}}\), इसलिए मुख्य मान \(y=\frac{3\pi}{4}\) है। \(\sec^{-1}\) में चिह्न से चतुर्थांश तय करें। / From \(\sec y=-\sqrt{2}\), \(\cos y=-\frac{1}{\sqrt{2}}\), so the principal value is \(y=\frac{3\pi}{4}\). For \(\sec^{-1}\), decide the quadrant from the sign.

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कौन सा फलन \(\left[-1,1\right]\) से \(\left[0,\pi\right]\) में परिभाषित होता है?

Which function is defined from \(\left[-1,1\right]\) to \(\left[0,\pi\right]\)?

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Correct Answer

B. \(\cos^{-1}x\)

Explanation

Simple Explanation

\(\cos^{-1}x\) का प्रांत \(\left[-1,1\right]\) और परिसर \(\left[0,\pi\right]\) है। प्रांत-परिसर वाले प्रश्नों में अंतराल तुरंत पहचानें। / The domain of \(\cos^{-1}x\) is \(\left[-1,1\right]\) and its range is \(\left[0,\pi\right]\). In domain-range questions, identify intervals first.

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\(\sin^{-1}\left(\sin\frac{7\pi}{6}\right)\) का मुख्य मान क्या है?

What is the principal value of \(\sin^{-1}\left(\sin\frac{7\pi}{6}\right)\)?

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Correct Answer

C. \(-\frac{\pi}{6}\)

Explanation

Simple Explanation

\(\sin\frac{7\pi}{6}=-\frac{1}{2}\), इसलिए \(\sin^{-1}\left(-\frac{1}{2}\right)=-\frac{\pi}{6}\)। उत्तर हमेशा \(\left[-\frac{\pi}{2},\frac{\pi}{2}\right]\) में रखें। / Since \(\sin\frac{7\pi}{6}=-\frac{1}{2}\), \(\sin^{-1}\left(-\frac{1}{2}\right)=-\frac{\pi}{6}\). Keep the answer in \(\left[-\frac{\pi}{2},\frac{\pi}{2}\right]\).

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\(\cos^{-1}\left(\cos\left(-\frac{\pi}{4}\right)\right)\) का मुख्य मान क्या है?

What is the principal value of \(\cos^{-1}\left(\cos\left(-\frac{\pi}{4}\right)\right)\)?

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Correct Answer

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

Explanation

Simple Explanation

\(\cos\left(-\frac{\pi}{4}\right)=\frac{1}{\sqrt{2}}\), इसलिए \(\cos^{-1}\left(\frac{1}{\sqrt{2}}\right)=\frac{\pi}{4})। (\cos^{-1}\) का उत्तर ऋणात्मक नहीं होता। / Since \(\cos\left(-\frac{\pi}{4}\right)=\frac{1}{\sqrt{2}}\), \(\cos^{-1}\left(\frac{1}{\sqrt{2}}\right)=\frac{\pi}{4}). The answer of (\cos^{-1}\) is not negative.

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

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

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Correct Answer

C. \(\frac{1}{\sqrt{2}}\)

Explanation

Simple Explanation

क्योंकि \(\sin^{-1}x+\cos^{-1}x=\frac{\pi}{2}\), दोनों बराबर होने पर हर एक \(\frac{\pi}{4}\) होगा। इसलिए \(x=\sin\frac{\pi}{4}=\frac{1}{\sqrt{2}}\)। / Since \(\sin^{-1}x+\cos^{-1}x=\frac{\pi}{2}\), if both are equal then each is \(\frac{\pi}{4}\). Hence \(x=\sin\frac{\pi}{4}=\frac{1}{\sqrt{2}}\).

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\(\tan\left(\cos^{-1}\frac{5}{13}\right)\) का मान क्या है?

What is the value of \(\tan\left(\cos^{-1}\frac{5}{13}\right)\)?

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Correct Answer

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

Explanation

Simple Explanation

मान लें \(\theta=\cos^{-1}\frac{5}{13}\), तब \(\cos\theta=\frac{5}{13}\) और \(\sin\theta=\frac{12}{13}\)। इसलिए \(\tan\theta=\frac{12}{5}\)। / Let \(\theta=\cos^{-1}\frac{5}{13}\), then \(\cos\theta=\frac{5}{13}\) and \(\sin\theta=\frac{12}{13}\). Therefore \(\tan\theta=\frac{12}{5}\).

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\(cosec^{-1}\left(\frac{2}{\sqrt{3}}\right)\) का मुख्य मान क्या है?

What is the principal value of \(cosec^{-1}\left(\frac{2}{\sqrt{3}}\right)\)?

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Correct Answer

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

Explanation

Simple Explanation

\(\csc y=\frac{2}{\sqrt{3}}\) से \(\sin y=\frac{\sqrt{3}}{2}\), इसलिए \(y=\frac{\pi}{3}\) है। \(\csc^{-1}\) को \(\sin^{-1}\) से जोड़कर हल करें। / From \(\csc y=\frac{2}{\sqrt{3}}\), \(\sin y=\frac{\sqrt{3}}{2}\), so \(y=\frac{\pi}{3}\). Solve \(\csc^{-1}\) by relating it to \(\sin^{-1}\).

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किस (x) के लिए \(\sin^{-1}(2x)\) वास्तविक रूप से परिभाषित है?

For which (x) is \(\sin^{-1}(2x)\) defined as a real number?

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Correct Answer

B. \(-\frac{1}{2}\le x\le \frac{1}{2}\)

Explanation

Simple Explanation

\(\sin^{-1}(2x)\) के लिए \(-1\le 2x\le 1\) चाहिए। अतः \(-\frac{1}{2}\le x\le \frac{1}{2}\) मिलेगा। / For \(\sin^{-1}(2x)\), we need \(-1\le 2x\le 1\). Hence \(-\frac{1}{2}\le x\le \frac{1}{2}\).

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