यदि $x = a(\theta + \sin \theta)$ और $y = a(1 - \cos \theta)$ है,तो $\frac{dy}{dx}$ ज्ञात कीजिए।

  • A
    $\tan \frac{\theta}{2}$
  • B
    $\cot \frac{\theta}{2}$
  • C
    $\sin \frac{\theta}{2}$
  • D
    $\cos \frac{\theta}{2}$

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