જો $\tan x = \frac{3}{4}$ અને $\pi < x < \frac{3 \pi}{2}$ હોય,તો $\cos \frac{x}{2} = . . . . . .$

  • A
    $\frac{-2}{5}$
  • B
    $\frac{2}{5}$
  • C
    $\frac{1}{\sqrt{10}}$
  • D
    $\frac{-1}{\sqrt{10}}$

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જો $90^{\circ} < A < 180^{\circ}$ અને $\sin A = \frac{4}{5}$ હોય,તો $\tan \frac{A}{2} =$

જો $\sin^3 x \sin 3x = \sum_{m=0}^n c_m \cos mx$ હોય,જ્યાં $c_0, c_1, c_2, \dots, c_n$ અચળાંકો છે અને $c_n \neq 0$,તો $n$ ની કિંમત શોધો.

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$\tan 20^\circ \cot 10^\circ \cot 50^\circ$ ની કિંમત શોધો.

જો $\frac{\cos ^2 48^{\circ}-\sin ^2 12^{\circ}}{\sin ^2 24^{\circ}-\sin ^2 6^{\circ}}=\frac{\alpha+\beta \sqrt{5}}{2}$, જ્યાં $\alpha, \beta \in N$, તો $\alpha+\beta$ ની કિંમત . . . . . . થાય.

જો $3 \sin x + 4 \cos x = 5$ હોય,તો $6 \tan \frac{x}{2} - 9 \tan^2 \frac{x}{2}$ ની કિંમત શોધો.

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