यदि $\cos \theta = \frac{-3}{5}$ और $\theta$ दूसरे चतुर्थांश में नहीं है,तो $\tan \frac{\theta}{2} = $

  • A
    $2$
  • B
    $1$
  • C
    $-2$
  • D
    $-1$

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

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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?

$\sqrt{2+\sqrt{2+2 \cos 4 \theta}} = $

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