$\sin 4\theta$ ને કેવી રીતે લખી શકાય?

  • A
    $4\sin \theta (1 - 2\sin^2 \theta )\sqrt{1 - \sin^2 \theta}$
  • B
    $2\sin \theta \cos \theta \sin^2 \theta$
  • C
    $4\sin \theta - 6\sin^3 \theta$
  • D
    આમાંથી કોઈ નહીં

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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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જો $\tanh(x) = \frac{1}{3}$ હોય,તો $\tanh(3x)$ ની કિંમત શોધો.

જો $\cos \theta = \frac{1}{2}\left( x + \frac{1}{x} \right)$ હોય,તો $\frac{1}{2}\left( x^2 + \frac{1}{x^2} \right) = $

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

જો $\frac{\sec 8\theta - 1}{\sec 4\theta - 1} = \frac{a + b \tan^2 2\theta}{1 + c \tan^2 2\theta + d \tan^4 2\theta}$ (જ્યાં $\theta \neq \frac{n\pi}{16}, n \in I$),તો $(a - b + c - d)$ ની કિંમત શોધો.

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