यदि $x = a \cos \theta$ और $y = a \sin \theta$ है,तो $\frac{dy}{dx}$ ज्ञात कीजिए।

  • A
    $-\cot \theta$
  • B
    $\tan \theta$
  • C
    $-\tan \theta$
  • D
    $\cot \theta$

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