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

  • A
    $-\frac{1}{2\sqrt{a^2 - x^2}}$
  • B
    $\frac{1}{2\sqrt{a^2 - x^2}}$
  • C
    $\frac{1}{2\sqrt{a^2 + x^2}}$
  • D
    इनमें से कोई नहीं

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$\frac{d}{dx} \left\{ \sin^2 \left( \cot^{-1} \sqrt{\frac{1 + x}{1 - x}} \right) \right\} =$

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