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

  • A
    $1$
  • B
    $2$
  • C
    $3$
  • D
    $\sqrt{3}/2$

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$\cos^2 \left( \frac{\pi}{6} + \theta \right) - \sin^2 \left( \frac{\pi}{6} - \theta \right) = $

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જો $x \sin 45^\circ \cos^2 60^\circ = \frac{\tan^2 60^\circ \csc 30^\circ}{\sec 45^\circ \cot^2 30^\circ}$ હોય,તો $x = $

જો $x = y \cos \frac{2\pi}{3} = z \cos \frac{4\pi}{3}$ હોય,તો $xy + yz + zx = $

જો $A = \sin^8 \theta + \cos^{14} \theta$ હોય,તો $\theta$ ની તમામ વાસ્તવિક કિંમતો માટે:

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