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

  • A
    $\frac{1}{16}$
  • B
    $\frac{1}{32}$
  • C
    $\frac{1}{8}$
  • D
    $\frac{1}{4}$

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જો $\sin \theta + \sin^2 \theta = 1$ હોય,તો $\cos^2 \theta + \cos^4 \theta$ ની કિંમત કેટલી થાય?

$x = 1 - x + x^2 - x^3 + x^4 - x^5 + \dots \infty$ સંબંધનું પાલન કરતી $x$ ની કિંમત શોધો.

$\frac{2\sin \theta \tan \theta (1 - \tan \theta ) + 2\sin \theta \sec^2 \theta}{(1 + \tan \theta )^2} = $

જો $\sin A = n \sin B$ હોય,તો $\frac{n - 1}{n + 1} \tan \frac{A + B}{2} = $

જો $\tan B = \frac{n \sin A \cos A}{1 - n \cos^2 A}$ હોય,તો $\tan(A + B)$ ની કિંમત શોધો.

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