If $x = a \sin \theta$ and $y = b \cos \theta$,then $\frac{d^2y}{dx^2}$ is

  • A
    $\frac{a}{b^2} \sec^2 \theta$
  • B
    $-\frac{b}{a} \sec^2 \theta$
  • C
    $-\frac{b}{a^2} \sec^3 \theta$
  • D
    $-\frac{b}{a^2} \sec^3 \theta$

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Match the values of $\frac{dy}{dx}$ at $\theta = \frac{\pi}{3}$ for the following system of curves in parametric form given in List-$I$ with those of the items in List-$II$.
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