If $x = a(\cos \theta + \theta \sin \theta )$ and $y = a(\sin \theta - \theta \cos \theta )$,then $\frac{dy}{dx} = $

  • A
    $\cos \theta $
  • B
    $\tan \theta $
  • C
    $\sec \theta $
  • D
    $\csc \theta $

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