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

  • A
    $0$
  • B
    $-1$
  • C
    $1$
  • D
    આમાંથી કોઈ નહીં

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જો $\sin \alpha = \frac{336}{625}$ અને $450^\circ < \alpha < 540^\circ$ હોય,તો $\sin \left( \frac{\alpha}{4} \right) = $

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$\cos 1^\circ + \cos 2^\circ + \cos 3^\circ + \dots + \cos 180^\circ = $

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$\sqrt {2 + \sqrt {2 + 2\cos 4\theta } } = $

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