જો $\sec x + \tan x = 2$,જ્યાં $0 < x < \frac{\pi}{2}$ હોય,તો $\sin \frac{x}{4}$ ની કિંમત શોધો.

  • A
    $\frac{1}{\sqrt{10+3 \sqrt{10}}}$
  • B
    $\frac{1}{\sqrt{2(10+3 \sqrt{10})}}$
  • C
    $\frac{1}{\sqrt{10-3 \sqrt{10}}}$
  • D
    $\frac{1}{2 \sqrt{10-3 \sqrt{10}}}$

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$\tan 3A - \tan 2A - \tan A = $

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

જો $\cos \theta = \frac{1}{2}\left( x + \frac{1}{x} \right)$ હોય,તો $\frac{1}{2}\left( x^2 + \frac{1}{x^2} \right) = $

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