यदि $90^{\circ} < A < 180^{\circ}$ और $\sin A = \frac{4}{5}$ है,तो $\tan \frac{A}{2} =$

  • A
    $\frac{1}{2}$
  • B
    $\frac{3}{5}$
  • C
    $\frac{3}{2}$
  • D
    $2$

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$\cos 15^{\circ} \cos 7.5^{\circ} \sin 7.5^{\circ}$ का मान क्या है?

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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