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$36(4 \cos^2 9^{\circ}-1)(4 \cos^2 27^{\circ}-1)(4 \cos^2 81^{\circ}-1)(4 \cos^2 243^{\circ}-1)$ का मान है

यदि $\sin x + \sin y = \frac{7}{5}$ और $\cos x + \cos y = \frac{1}{5}$ है,तो $\sin(x + y)$ का मान ज्ञात कीजिए।

$\csc \frac{\pi}{18} - \sqrt{3} \sec \frac{\pi}{18}$ का मान एक

$\frac{1+\cos \theta-\sin \theta}{1+\cos \theta+\sin \theta}+\frac{1+\cos \theta+\sin \theta}{1+\cos \theta-\sin \theta}=$

$6(\sin^6 \theta + \cos^6 \theta) - 9(\sin^4 \theta + \cos^4 \theta) + 4$ का मान है

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