જો $\tan A = \frac{1 - \cos B}{\sin B}$ હોય,તો $\tan 2A =$

  • A
    $\tan B$
  • B
    $\cot B$
  • C
    $2 \tan B$
  • D
    $2 \cot B$

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જો $\frac{5\pi}{2} < x < 3\pi$ હોય,તો પદાવલિ $\frac{\sqrt{1 - \sin x} + \sqrt{1 + \sin x}}{\sqrt{1 - \sin x} - \sqrt{1 + \sin x}}$ ની કિંમત શોધો.

જો $A = \sin^2 x + \cos^4 x$ હોય,તો તમામ વાસ્તવિક $x$ માટે :

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$\tan 4^{\circ} \tan 43^{\circ} \tan 47^{\circ} \tan 86^{\circ}$ નું મૂલ્ય શોધો.

$\sin ^{2} 75^{\circ}-\sin ^{2} 15^{\circ}$ નું મૂલ્ય કેટલું છે?

$\sqrt{3} \csc 20^\circ - \sec 20^\circ = $

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