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यदि $\sin x = \frac{1}{4}$ और $x$ द्वितीय चतुर्थांश में है,तो $\sin \frac{x}{2}, \cos \frac{x}{2}$ और $\tan \frac{x}{2}$ का मान ज्ञात कीजिए।

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यदि $\cos A = \frac{3}{4}$ है,तो $32\sin \frac{A}{2}\cos \frac{5A}{2} = $

$\frac{1}{\tan 3A - \tan A} - \frac{1}{\cot 3A - \cot A} = $

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

यदि $\sqrt{\frac{1+\cos A}{1-\cos A}}=\frac{x}{y}$ है,तो $\tan A$ का मान किसके बराबर है?

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