$\cos 52^\circ + \cos 68^\circ + \cos 172^\circ$ ની કિંમત શોધો.

  • A
    $0$
  • B
    $1$
  • C
    $2$
  • D
    $\frac{3}{2}$

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જો $\cos \alpha + \cos \beta = \frac{3}{2}$ અને $\sin \alpha + \sin \beta = \frac{1}{2}$ હોય અને $\theta$ એ $\alpha$ અને $\beta$ નો સમાંતર મધ્યક હોય,તો $\sin 2\theta + \cos 2\theta$ ની કિંમત શોધો.

$36(4 \cos^2 9^{\circ}-1)(4 \cos^2 27^{\circ}-1)(4 \cos^2 81^{\circ}-1)(4 \cos^2 243^{\circ}-1)$ ની કિંમત શોધો.

જો $\theta$ એ લઘુકોણ હોય,$\cosh x = K$ અને $\sinh x = \tan \theta$ હોય,તો $\sin \theta =$

${\sin ^4}\frac{\pi }{8} + {\sin ^4}\frac{{3\pi }}{8} + {\sin ^4}\frac{{5\pi }}{8} + {\sin ^4}\frac{{7\pi }}{8} = $

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જો $\cos A = m \cos B$ હોય,તો

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