જો $y = \tan^{-1} \sqrt{\frac{1 + \cos x}{1 - \cos x}}$ હોય,તો $\frac{dy}{dx}$ શું થાય?

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

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