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

  • A
    $\frac{8}{9}$
  • B
    $\frac{7}{9}$
  • C
    $1$
  • D
    $\frac{2}{3}$

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$\sin^{2}\left(\frac{\pi}{8}\right)$ ની કિંમત =

$\sqrt{\frac{1 - \sin A}{1 + \sin A}} = $

નીચેનામાંથી કઈ સંખ્યા/સંખ્યાઓ સંમેય છે?

$\cos^3 \frac{\pi}{8} \cos \frac{3\pi}{8} + \sin^3 \frac{\pi}{8} \sin \frac{3\pi}{8} = $

$\cos \left(\frac{2 \pi}{7}\right) + \cos \left(\frac{4 \pi}{7}\right) + \cos \left(\frac{6 \pi}{7}\right)$ ની કિંમત શોધો.

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