$\frac{\sin 3\theta + \sin 5\theta + \sin 7\theta + \sin 9\theta}{\cos 3\theta + \cos 5\theta + \cos 7\theta + \cos 9\theta} = $

  • A
    $\tan 3\theta$
  • B
    $\cot 3\theta$
  • C
    $\tan 6\theta$
  • D
    $\cot 6\theta$

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$(\cos \alpha+\cos \beta)^2+(\sin \alpha+\sin \beta)^2$ ની કિંમત શું છે?

જો $\cos (A + B) = \alpha \cos A \cos B + \beta \sin A \sin B$ હોય,તો $(\alpha, \beta) =$

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