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$\cos A \cos 2 A \cos 4 A \ldots \cos 2^{n-1} A$ का मान क्या है?

यदि $3 \sin \theta = 2 \sin 3 \theta$ और $0 < \theta < \pi$ है,तो $\sin \theta =$

$\tan 3A - \tan 2A - \tan A = $

यदि $\theta = 3\alpha$ और $\sin \theta = \frac{a}{\sqrt{a^2 + b^2}}$ है,तो व्यंजक $a \csc \alpha - b \sec \alpha$ का मान क्या है?

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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