यदि $\sec x + \tan x = 2$,जहाँ $0 < x < \frac{\pi}{2}$ है,तो $\sin \frac{x}{4}$ का मान ज्ञात कीजिए।

  • 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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यदि $\cot \frac{2x}{3} + \tan \frac{x}{3} = \operatorname{cosec} \frac{kx}{3}$ है, तो $k$ का मान है

यदि $\sin 6\theta = 32\cos^5\theta \sin\theta - 32\cos^3\theta \sin\theta + 3x$ है,तो $x = $

$\cos \frac{\pi}{2^2} \cdot \cos \frac{\pi}{2^3} \cdot \cos \frac{\pi}{2^4} \cdots \cos \frac{\pi}{2^{10}} = $

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