$\cos ^{-1}\left(\frac{-1}{2}\right)-2 \sin ^{-1}\left(\frac{1}{2}\right)+3 \cos ^{-1}\left(\frac{-1}{\sqrt{2}}\right)-4 \tan ^{-1}(-1)$ का मान ज्ञात कीजिए।

  • A
    $\frac{19 \pi}{12}$
  • B
    $\frac{35 \pi}{12}$
  • C
    $\frac{47 \pi}{12}$
  • D
    $\frac{43 \pi}{12}$

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सिद्ध कीजिए कि $\cot ^{-1}\left(\frac{\sqrt{1+\sin x}+\sqrt{1-\sin x}}{\sqrt{1+\sin x}-\sqrt{1-\sin x}}\right)=\frac{x}{2}$,जहाँ $x \in\left(0, \frac{\pi}{4}\right)$.

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यदि $\cos^{-1} x + \cos^{-1} y = 2\pi$ है,तो $\sin^{-1} x + \sin^{-1} y$ का मान ज्ञात कीजिए।

$\sinh^{-1}\left(\frac{x}{\sqrt{1-x^2}}\right)$ किसके बराबर है?

$\cot ^{-1}\left(\frac{\sqrt{1+\tan ^2(2)}-1}{\tan (2)}\right)-\cot ^{-1}\left(\frac{\sqrt{1+\tan ^2\left(\frac{1}{2}\right)}+1}{\tan \left(\frac{1}{2}\right)}\right)$ का मान ज्ञात कीजिए।

यदि $0 < x < \frac{1}{\sqrt{2}}$ और $\frac{\sin ^{-1} x}{\alpha}=\frac{\cos ^{-1} x}{\beta}$ है,तो $\sin \left(\frac{2 \pi \alpha}{\alpha+\beta}\right)$ का मान $......$ है।

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