यदि $P = \tan 15^{\circ} + \cot 15^{\circ}$,$Q = \tan 22 \frac{1}{2}^{\circ} + \cot 22 \frac{1}{2}^{\circ}$ और $R = \sin 54^{\circ} + \sin 18^{\circ}$ है,तो उनका आरोही क्रम क्या है?

  • A
    $P, Q, R$
  • B
    $P, R, Q$
  • C
    $R, Q, P$
  • D
    $R, P, Q$

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व्यंजक $\tan 9^{\circ}-\tan 27^{\circ}-\tan 63^{\circ}+\tan 81^{\circ}$ का मान ज्ञात कीजिए।

यदि $\cosh 2x = 199$ है,तो $\operatorname{coth} x =$

$\cos ^2 76^{\circ}+\sin ^2 46^{\circ}+\sin 76^{\circ} \cos 46^{\circ} = $

$\tan \frac{2 \pi}{7} \cdot \tan \frac{4 \pi}{7} + \tan \frac{4 \pi}{7} \cdot \tan \frac{\pi}{7} + \tan \frac{\pi}{7} \cdot \tan \frac{2 \pi}{7} = $

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