यदि $\operatorname{cosec} \theta = \frac{p+q}{p-q}$ है,तो $\cot \left(\frac{\pi}{4} + \frac{\theta}{2}\right)$ का मान ज्ञात कीजिए।

  • A
    $\sqrt{\frac{q}{p}}$
  • B
    $\sqrt{\frac{p}{q}}$
  • C
    $\sqrt{pq}$
  • D
    $pq$

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$\tan {20^\circ} + 2\tan {50^\circ} - \tan {70^\circ}$ का मान किसके बराबर है?

यदि $\frac{1 - \cos x}{\cos x(1 + \cos x)} = \frac{\sin \alpha}{\cos x} - \frac{2}{1 + \cos x}$ है,तो $\alpha = $

$\cos \frac{2 \pi}{7}+\cos \frac{4 \pi}{7}+\cos \frac{6 \pi}{7}$

$\sin ^4 \frac{\pi}{8}+\cos ^4 \frac{\pi}{8}+\sin ^4 \frac{3 \pi}{8}+\cos ^4 \frac{3 \pi}{8}+\sin ^4 \frac{5 \pi}{8}+\cos ^4 \frac{5 \pi}{8}+\sin ^4 \frac{7 \pi}{8}+\cos ^4 \frac{7 \pi}{8}=$

समीकरण $2 \cos(e^x) = 5^x + 5^{-x}$ के हलों की संख्या है:

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