કિંમત શોધો: $\cos^2 48^\circ - \sin^2 12^\circ$

  • A
    $\frac{\sqrt{5} - 1}{4}$
  • B
    $\frac{\sqrt{5} + 1}{8}$
  • C
    $\frac{\sqrt{3} - 1}{4}$
  • D
    $\frac{\sqrt{3} + 1}{2\sqrt{2}}$

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$\frac{\tan 52^{\circ} - \tan 38^{\circ}}{\tan 14^{\circ}} = $

$1 - 2{\sin ^2}\left( {\frac{\pi }{4} + \theta } \right) = $

$\tan\, 20^{\circ} + \tan\, 40^{\circ} + \sqrt{3}\, \tan\, 20^{\circ} \tan\, 40^{\circ}$ ની કિંમત શું થાય?

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