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

$\cos^2 73^\circ + \cos^2 47^\circ + (\cos 73^\circ \cdot \cos 47^\circ)$ का सटीक मान क्या है?

यदि $\tan (\pi \cos \theta) = \cot (\pi \sin \theta)$ है,तो $\sin \left(\frac{\pi}{4} + \theta\right) =$

यदि $\frac{1}{\sin 45^{\circ} \sin 46^{\circ}}+\frac{1}{\sin 46^{\circ} \sin 47^{\circ}}+\ldots$ $45$ पदों तक $=\frac{1}{\sin x^{\circ}}$ है,तो $\sin \left(\frac{\pi}{2} x\right)=$

व्यंजक $\frac{\tan^2 20^\circ - \sin^2 20^\circ}{\tan^2 20^\circ \cdot \sin^2 20^\circ}$ का सरलीकरण है

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