$2 \cosh (x+y) \sinh (x-y) + \sinh 2y =$

  • A
    $\sinh 2x$
  • B
    $\frac{\sinh 2x + \sinh 2y}{2}$
  • C
    $\frac{\sinh 2x - \sinh 2y}{2}$
  • D
    $\cosh 2x$

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જો $2 \sin \left(\theta+\frac{\pi}{3}\right)=\cos \left(\theta-\frac{\pi}{6}\right)$ હોય,તો $\tan \theta$ ની કિંમત શોધો.

$\tan\, 20^{\circ} + \tan\, 40^{\circ} + \sqrt{3}\, \tan\, 20^{\circ} \tan\, 40^{\circ}$ ની કિંમત શું થાય?

જો $\cos \theta = \frac{8}{17}$ અને $\theta$ એ $1^{st}$ ચરણમાં હોય,તો $\cos (30^\circ + \theta) + \cos (45^\circ - \theta) + \cos (120^\circ - \theta)$ ની કિંમત શોધો.

સાબિત કરો કે $\cos \left(\frac{3 \pi}{4}+x\right)-\cos \left(\frac{3 \pi}{4}-x\right)=-\sqrt{2} \sin x$.

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