નીચેનામાંથી કયું નિત્યસમ સાચું છે?

  • A
    $\sin 5 \theta = 16 \cos^4 \theta \sin \theta - 12 \cos^2 \theta \sin \theta + \sin \theta$
  • B
    $\sin 5 \theta = 16 \cos^4 \theta - 12 \cos^2 \theta + 1$
  • C
    $\sin 5 \theta = 16 \cos^4 \theta \sin \theta + 12 \cos^2 \theta \sin \theta - \sin \theta$
  • D
    $\sin 5 \theta = 16 \cos^4 \theta \sin \theta + 12 \cos^2 \theta \sin \theta + \sin \theta$

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જો $\frac{1}{2}\left(\tan \left(\frac{\pi}{24}\right)+\cot \left(\frac{\pi}{24}\right)\right)=\sqrt{a^2+a}+\sqrt{a}$ હોય,તો $a=$

$\operatorname{cosec} 2 \theta - \cot 2 \theta = ?$

જો $2 \cos \theta = x + \frac{1}{x}$ હોય,તો $2 \cos 3 \theta = $

$\tan \left(\frac{3 \pi}{16}\right)+\cot \left(\frac{3 \pi}{16}\right)=$

જો $\tan A = \frac{1}{2}$ હોય,તો $\tan 3A = $

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