$\cos y \cos \left( \frac{\pi}{2} - x \right) - \cos \left( \frac{\pi}{2} - y \right) \cos x + \sin y \cos \left( \frac{\pi}{2} - x \right) + \cos x \sin \left( \frac{\pi}{2} - y \right)$ ની કિંમત શૂન્ય થાય,જો

  • A
    $x = 0$
  • B
    $y = 0$
  • C
    $x = y$
  • D
    $x = n\pi - \frac{\pi}{4} + y, (n \in I)$

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

$\frac{(\tan 69^{\circ} + \tan 66^{\circ})}{(1 - \tan 69^{\circ} \tan 66^{\circ})}$ ની કિંમત શોધો.

જો $A$ ત્રીજા ચરણમાં હોય અને $3 \tan A - 4 = 0$ હોય,તો $5 \sin 2A + 3 \sin A + 4 \cos A$ ની કિંમત શોધો.

$\sin 20^\circ \sin 40^\circ \sin 60^\circ \sin 80^\circ = $ ($/16$ માં)

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