જો $\sin x + \sin^{2} x = 1$ હોય,તો $\cos^{8} x + 2 \cos^{6} x + \cos^{4} x$ ની કિંમત શોધો.

  • A
    $3$
  • B
    $2$
  • C
    $1$
  • D
    $4$

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જો $\tan A = 2\tan B + \cot B$ હોય,તો $2\tan (A - B) = $

જો $\sin A+\sin B=\sqrt{3}(\cos B-\cos A)$ હોય,તો $\sin 3A+\sin 3B$ ની કિંમત શોધો.

જો $\frac{\sin^4 x}{2} + \frac{\cos^4 x}{3} = \frac{1}{5}$ હોય,તો $27 \sec^6 x + 8 \operatorname{cosec}^6 x = $

$\cos \frac{7 \pi}{8}+\cos \frac{\pi}{4}+\cos \left(\frac{-\pi}{8}\right)-1=$

જો $\alpha = 22^\circ 30'$ હોય,તો $(1 + \cos \alpha )(1 + \cos 3\alpha )(1 + \cos 5\alpha )(1 + \cos 7\alpha )$ ની કિંમત શોધો.

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