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જો $\operatorname{cosec}^2(\alpha+\beta)-\sin^2(\beta-\alpha)+\sin^2(2\alpha-\beta)=\cos^2(\alpha-\beta)$ જ્યાં $\alpha, \beta \in (0, \frac{\pi}{2})$ હોય,તો $\sin(\alpha-\beta)$ ની કિંમત શોધો.

જો $\tan^2 \theta = 2\tan^2 \phi + 1$ હોય,તો $\cos 2\theta + \sin^2 \phi$ ની કિંમત શોધો.

પદાવલિનું મૂલ્ય શોધો: $\left(1+\cos \frac{\pi}{8}\right)\left(1+\cos \frac{2 \pi}{8}\right)\left(1+\cos \frac{3 \pi}{8}\right)\left(1+\cos \frac{4 \pi}{8}\right)\left(1+\cos \frac{5 \pi}{8}\right)\left(1+\cos \frac{6 \pi}{8}\right)\left(1+\cos \frac{7 \pi}{8}\right)$

$\sin 10^\circ + \sin 20^\circ + \sin 30^\circ + \dots + \sin 360^\circ$ નું મૂલ્ય શું છે?

$R$ થી $R$ પર વ્યાખ્યાયિત નીચેના વિધેયોમાંથી,અચળ વિધેય કયું છે?

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