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$\sin ^4 \frac{\pi}{8} + \cos ^4 \frac{3 \pi}{8} - \sin ^4 \frac{3 \pi}{8} + \sin ^4 \frac{5 \pi}{8} + \cos ^4 \frac{7 \pi}{8} - \sin ^4 \frac{7 \pi}{8} = ?$

$\text{sech}(i\pi)$ ની કિંમત શું છે?

$\tan (-945^\circ)$ ની કિંમત શોધો.

$(-\sqrt{3}, -1)$ ના ધ્રુવીય યામ કયા છે?

સાબિત કરો કે $3 \sin \frac{\pi}{6} \sec \frac{\pi}{3} - 4 \sin \frac{5 \pi}{6} \cot \frac{\pi}{4} = 1$.

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