यदि $\sin \theta + \sin 2\theta + \sin 3\theta = \sin \alpha$ और $\cos \theta + \cos 2\theta + \cos 3\theta = \cos \alpha$ है,तो $\theta$ का मान ज्ञात कीजिए।

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

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$\sin^6 \theta + \cos^6 \theta + 3 \sin^2 \theta \cos^2 \theta = $

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