$\frac{d}{d x} \tan ^{-1}\left[\frac{\sqrt{1+\sin x}-\sqrt{1-\sin x}}{\sqrt{1+\sin x}+\sqrt{1-\sin x}}\right]$ का मान ज्ञात कीजिए।

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

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