$3(\sin x-\cos x)^{4}+6(\sin x+\cos x)^{2}+4(\sin ^{6} x+\cos ^{6} x)$ ની કિંમત શું થાય?

  • A
    $12$
  • B
    $13$
  • C
    $14$
  • D
    $11$

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જો $0 < B < A < \frac{\pi}{4}$,$\cos^2 B - \sin^2 A = \frac{\sqrt{3}+1}{4\sqrt{2}}$ અને $2 \cos A \cos B = \frac{1+\sqrt{2}+\sqrt{3}}{2\sqrt{2}}$ હોય,તો $\cos^2 \frac{4B}{3} - \sin^2 \frac{4A}{5} =$

$\tan 40^{\circ} + \tan 11^{\circ} + \tan 20^{\circ} - \tan 56^{\circ} + \tan 56^{\circ} \tan 11^{\circ} + \sqrt{3} \tan 40^{\circ} \tan 20^{\circ}$ ની કિંમત શોધો.

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$\frac{4 \sin 9^{\circ} \sin 21^{\circ} \sin 39^{\circ} \sin 51^{\circ} \sin 69^{\circ} \sin 81^{\circ}}{\sin 54^{\circ}}$ ની કિંમત શોધો.

જો $\cot x \cot y = a$ અને $x+y = \frac{\pi}{6}$ હોય,તો $\cot x$ અને $\cot y$ ના બીજ ધરાવતું દ્વિઘાત સમીકરણ કયું છે?

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