$\cos^2 48^\circ - \sin^2 12^\circ = $

  • A
    $\frac{\sqrt{5} - 1}{4}$
  • B
    $\frac{\sqrt{5} + 1}{8}$
  • C
    $\frac{\sqrt{3} - 1}{4}$
  • D
    $\frac{\sqrt{3} + 1}{2\sqrt{2}}$

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$\frac{1+\sin \theta-\cos \theta}{1+\sin \theta+\cos \theta}$ ની કિંમત શોધો.

$\cos 2(\theta + \phi ) - 4\cos (\theta + \phi )\sin \theta \sin \phi + 2{\sin ^2}\phi = $

જો $\theta$ બીજા ચરણમાં હોય,તો $\sqrt{\frac{1 - \sin \theta}{1 + \sin \theta}} + \sqrt{\frac{1 + \sin \theta}{1 - \sin \theta}}$ ની કિંમત શોધો.

જો $\sin 600^{\circ} \cos 30^{\circ} + \cos 120^{\circ} \sin 150^{\circ} = k$ હોય,તો $k =$

પદાવલિ $\frac{\tan 57^{\circ}+\cot 37^{\circ}}{\tan 33^{\circ}+\cot 53^{\circ}}$ ની કિંમત કેટલી થાય?

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