જો $\sin A, \cos A$ અને $\tan A$ એ $G.P.$ માં હોય,તો $\cos^3 A + \cos^2 A$ ની કિંમત કેટલી થાય?

  • A
    $1$
  • B
    $2$
  • C
    $4$
  • D
    આમાંથી કોઈ નહીં

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જો $\theta$ એ લઘુકોણ હોય અને $\sin \frac{\theta}{2} = \sqrt{\frac{x - 1}{2x}}$ હોય,તો $\tan \theta$ ની કિંમત શોધો.

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જો $x = y \cos \frac{2\pi}{3} = z \cos \frac{4\pi}{3}$ હોય,તો $xy + yz + zx = $

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