यदि $\frac{5\pi}{2} < x < 3\pi$ है,तो व्यंजक $\frac{\sqrt{1 - \sin x} + \sqrt{1 + \sin x}}{\sqrt{1 - \sin x} - \sqrt{1 + \sin x}}$ का मान क्या है?

  • A
    $-\cot \frac{x}{2}$
  • B
    $\cot \frac{x}{2}$
  • C
    $\tan \frac{x}{2}$
  • D
    $-\tan \frac{x}{2}$

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सिद्ध कीजिए कि $\tan 4x = \frac{4 \tan x (1 - \tan^2 x)}{1 - 6 \tan^2 x + \tan^4 x}$.

यदि $A$,$\frac{\pi}{2}$ का पूर्णांक गुणज नहीं है,तो $\operatorname{cosec} 2A + \cot 2A$ किसके बराबर है?

यदि $x + \frac{1}{x} = 2 \cos \theta$ है,तो $x^3 + \frac{1}{x^3} = $

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

यदि $a \tan \theta = b$ है,तो $a \cos 2\theta + b \sin 2\theta = $

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