જો $\alpha = \sin 36^{\circ}$ હોય,તો $\alpha$ નીચેનામાંથી કયા સમીકરણનું બીજ છે?

  • A
    $10 x^{4}-10 x^{2}-5=0$
  • B
    $16 x^{4}+20 x^{2}-5=0$
  • C
    $16 x^{4}-20 x^{2}+5=0$
  • D
    $16 x^{4}-10 x^{2}+5=0$

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જો $\sin(x+3\alpha) + 3\sin(x-\alpha) = 0$ હોય,તો

$\cos \frac{\pi}{7} \cos \frac{2\pi}{7} \cos \frac{3\pi}{7} =$

જો $3 \sin 2 \theta = 2 \sin 3 \theta$ અને $0 < \theta < \pi$ હોય,તો $\sin \theta$ ની કિંમત કેટલી થાય?

$2\sin A\cos^3 A - 2\sin^3 A\cos A = $

જો $\frac{2 \sin \theta}{1+\cos \theta+\sin \theta}=y$ હોય,તો $\frac{1-\cos \theta+\sin \theta}{1+\sin \theta}=$

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