यदि $\cos 3\theta = \alpha \cos \theta + \beta \cos^3 \theta$ है,तो $(\alpha, \beta) = $

  • A
    $(3, 4)$
  • B
    $(4, 3)$
  • C
    $(-3, 4)$
  • D
    $(3, -4)$

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यदि $3 \sin 2 \theta = 2 \sin 3 \theta$ और $0 < \theta < \pi$ है,तो $\sin \theta$ का मान क्या होगा?

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$\frac{1-\cos 2 \theta+\sin 2 \theta}{1+\cos 2 \theta+\sin 2 \theta}=$

यदि $\frac{2\sin \alpha}{1 + \cos \alpha + \sin \alpha} = y$ है,तो $\frac{1 - \cos \alpha + \sin \alpha}{1 + \sin \alpha} = $

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