જો $y = \cos^{-1}(\tanh x) + \sinh(\sin 6x)$ હોય,તો $\frac{dy}{dx} =$

  • A
    $\frac{-1}{\cosh x} + 6 \cos 6x \cosh(\sin 6x)$
  • B
    $\frac{1}{\cosh x} - 6 \cos 6x \cosh(\sin 6x)$
  • C
    $\frac{-1}{\cosh x} - 6 \cos 6x \cosh(\sin 6x)$
  • D
    $\frac{1}{\cosh x} + 6 \cos 6x \cosh(\sin 6x)$

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