यदि $0 < x < 1$ है,तो $y = \cos^{-1}\left(\frac{1-x^2}{1+x^2}\right)$ के लिए $\frac{dy}{dx}$ ज्ञात कीजिए।

  • A
    $\frac{2}{1+x^2}$
  • B
    $\frac{1}{1+x^2}$
  • C
    $\frac{-2}{1+x^2}$
  • D
    $\frac{-1}{1+x^2}$

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$\tan ^{-1}\left(\frac{1}{3}\right)+\tan ^{-1}\left(\frac{1}{5}\right)+\tan ^{-1}\left(\frac{1}{7}\right)+\tan ^{-1}\left(\frac{1}{8}\right)$ का मान है

$\tan \left(\cos ^{-1}\left(\frac{4}{5}\right)+\tan ^{-1}\left(\frac{2}{3}\right)\right)$ का मान है

$2 \cos ^{-1} x = \sin ^{-1} \left( 2 x \sqrt{1 - x^2} \right)$,$x$ के किन मानों के लिए मान्य है?

यदि $y = \tan^{-1}\left( \frac{\sqrt{a} - \sqrt{x}}{1 + \sqrt{ax}} \right)$ है,तो $\frac{dy}{dx} = $

$\sec ^2(\tan ^{-1} 2)+\operatorname{cosec}^2(\cot ^{-1} 3) = $

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