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$\sin (\pi + \theta )\sin (\pi - \theta )\csc^2 \theta = $

मान लीजिए $\triangle ACB$ एक त्रिभुज है जिसमें $C$ पर समकोण है। यदि $AB = 29$ इकाई,$BC = 21$ इकाई और $\angle ABC = \theta$ है,तो $\cos^2 \theta - \sin^2 \theta = $

व्यंजक $\frac{\tan(x - \frac{\pi}{2}) \cdot \cos(\frac{3\pi}{2} + x) - \sin^3(\frac{7\pi}{2} - x)}{\cos(x - \frac{\pi}{2}) \cdot \tan(\frac{3\pi}{2} + x)}$ का सरलीकृत रूप है:

सिद्ध कीजिए कि: $\cot ^{2} \frac{\pi}{6} + \csc \frac{5 \pi}{6} + 3 \tan ^{2} \frac{\pi}{6} = 6$

$(\sin 210^{\circ})(\sin 585^{\circ})$ का मान क्या है?

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