જો $x = \cos 2t + \log(\tan t)$ અને $y = 2t + \cot 2t$ હોય, તો $\frac{dy}{dx} = $

  • A
    $\tan 2t$
  • B
    $-\operatorname{cosec} 2t$
  • C
    $-\cot 2t$
  • D
    $\sec 2t$

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