यदि $\tan \frac{\theta}{2} = \operatorname{cosec} \theta - \sin \theta$ है,तो $\tan^2 \frac{\theta}{2} =$

  • A
    $2 - \sqrt{5}$
  • B
    $-2 + \sqrt{5}$
  • C
    $2 + \sqrt{5}$
  • D
    $\sqrt{2} + 5$

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मान लीजिए $f_n(x) = \tan \frac{x}{2}(1 + \sec x)(1 + \sec 2x) \dots (1 + \sec 2^n x)$,तो

$\frac{\sec 8A - 1}{\sec 4A - 1} = $

यदि $\cos A = \frac{3}{4}$ है,तो $32\sin \left( \frac{A}{2} \right)\sin \left( \frac{5A}{2} \right) = $

यदि $A = 580^\circ$ है,तो निम्नलिखित में से कौन सा सत्य है?

$\frac{\sec 8\theta - 1}{\sec 4\theta - 1}$ किसके बराबर है?

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