यदि $y = \tan^{-1} \left[ \frac{\sin x + \cos x}{\cos x - \sin x} \right]$ है,तो $\frac{dy}{dx}$ का मान ज्ञात कीजिए।

  • A
    $1/2$
  • B
    $\pi/4$
  • C
    $0$
  • D
    $1$

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$\frac{d}{d x}\left[\cos ^{2}\left(\cot ^{-1} \sqrt{\frac{2+x}{2-x}}\right)\right]$ का मान ज्ञात कीजिए।

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