यदि $y = \log \tan \left(\frac{x}{2}\right) + \sin^{-1}(\cos x)$ है,तो $\frac{dy}{dx} = $

  • A
    $\operatorname{cosec} x$
  • B
    $\sin x + 1$
  • C
    $x$
  • D
    $\operatorname{cosec} x - 1$

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