$\frac{d}{d x}\left[\cos ^2\left(\cot ^{-1} \sqrt{\frac{2+x}{2-x}}\right)\right]$ ની કિંમત શોધો.

  • A
    $-\frac{3}{4}$
  • B
    $-\frac{1}{2}$
  • C
    $\frac{1}{2}$
  • D
    $\frac{1}{4}$

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