वक्र $y = 3 \sin \theta \cos \theta$,$x = e^{\theta} \sin \theta$,$0 \leq \theta \leq \pi$ के लिए,स्पर्शरेखा $x-$अक्ष के समानांतर तब होती है जब $\theta$ है

  • A
    $\frac{3\pi}{4}$
  • B
    $\frac{\pi}{2}$
  • C
    $\frac{\pi}{4}$
  • D
    $\frac{\pi}{6}$

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