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

  • A
    $\sec A + \tan A$
  • B
    $\tan \left( \frac{\pi}{4} - A \right)$
  • C
    $\tan \left( \frac{\pi}{4} + \frac{A}{2} \right)$
  • D
    $\tan \left( \frac{\pi}{4} - \frac{A}{2} \right)$

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જો $2\cos^2 \theta - 2\sin^2 \theta = 1$ હોય,તો $\theta = \dots ^\circ$.

$\cos \frac{\pi}{2^2} \cdot \cos \frac{\pi}{2^3} \cdot \dots \cdot \cos \frac{\pi}{2^{10}} \cdot \sin \frac{\pi}{2^{10}}$ ની કિંમત શોધો.

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