જો $\sin \theta + \sin 2\theta + \sin 3\theta = \sin \alpha$ અને $\cos \theta + \cos 2\theta + \cos 3\theta = \cos \alpha$ હોય,તો $\theta$ ની કિંમત શોધો.

  • A
    $\alpha / 2$
  • B
    $\alpha$
  • C
    $2\alpha$
  • D
    $\alpha / 6$

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