જો $\sec \theta = 1\frac{1}{4}$ હોય,તો $\tan \frac{\theta}{2} = $

  • A
    $\frac{1}{3}$
  • B
    $\frac{3}{4}$
  • C
    $\frac{1}{4}$
  • D
    $\frac{5}{4}$

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$\tan 20^\circ \tan 40^\circ \tan 60^\circ \tan 80^\circ = $

જો $\cos \frac{\pi}{4} \cos \frac{\pi}{8} \cos \frac{\pi}{16} \cos \frac{\pi}{32} = 2^m \operatorname{cosec} \frac{\pi}{n}$ હોય,તો $m+n=$

$\sqrt{2} + \sqrt{3} + \sqrt{4} + \sqrt{6}$ ની કિંમત શોધો.

જો $\cos^3 \theta + \cos^3 \left(\frac{2 \pi}{3} + \theta\right) + \cos^3 \left(\frac{4 \pi}{3} + \theta\right) = \alpha \cos 3 \theta$ હોય,તો $\alpha$ ની કિંમત શોધો.

સાબિત કરો કે $\sin 2x + 2 \sin 4x + \sin 6x = 4 \cos^2 x \sin 4x$.

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