यदि $\sin \alpha = \frac{336}{625}$ और $450^\circ < \alpha < 540^\circ$ है,तो $\sin \left( \frac{\alpha}{4} \right) = $

  • A
    $\frac{1}{5\sqrt{2}}$
  • B
    $\frac{7}{25}$
  • C
    $\frac{4}{5}$
  • D
    $\frac{3}{5}$

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यदि $\cos \frac{\pi}{4} \cos \frac{\pi}{8} \cos \frac{\pi}{16} \cos \frac{\pi}{32} = 2^m \operatorname{cosec} \frac{\pi}{n}$ है,तो $m+n=$

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यदि $L = \sin^{2}\left(\frac{\pi}{16}\right) - \sin^{2}\left(\frac{\pi}{8}\right)$ और $M = \cos^{2}\left(\frac{\pi}{16}\right) - \sin^{2}\left(\frac{\pi}{8}\right)$ है,तो निम्नलिखित में से कौन सा सही है?

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