यदि $\cot ^{-1}(\sqrt{\cos \alpha})-\tan ^{-1}(\sqrt{\cos \alpha})=x$ है,तो $\sin x$ का मान है

  • A
    $\cot ^2 \frac{\alpha}{2}$
  • B
    $\cot \frac{\alpha}{2}$
  • C
    $\tan \frac{\alpha}{2}$
  • D
    $\tan ^2 \frac{\alpha}{2}$

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यदि ${\sin ^{ - 1}}\left( {\frac{{2a}}{{1 + {a^2}}}} \right) + {\sin ^{ - 1}}\left( {\frac{{2b}}{{1 + {b^2}}}} \right) = 2{\tan ^{ - 1}}x,$ तो $x = $

यदि त्रिभुज $ABC$ में $\angle A = 90^\circ$ है,तो $\tan^{-1}\left(\frac{c}{a+b}\right) + \tan^{-1}\left(\frac{b}{a+c}\right) = $

$\tan \left(2 \tan ^{-1} \frac{1}{5} + \sec ^{-1} \frac{\sqrt{5}}{2} + 2 \tan ^{-1} \frac{1}{8}\right)$ का मान ज्ञात कीजिए।

अवकलज ज्ञात कीजिए: $\frac{d}{dx} \cos^{-1} \left( \frac{x - x^{-1}}{x + x^{-1}} \right)$

$\tan \left[ {\frac{\pi }{4} + \frac{1}{2}{{\cos }^{ - 1}}\frac{a}{b}} \right] + \tan \left[ {\frac{\pi }{4} - \frac{1}{2}{{\cos }^{ - 1}}\frac{a}{b}} \right] = $

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