sin(-5пи/6)+ sin(пи/6)+sinпи+sin(-пи/4). Created by Азазин. algebra-ru

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Азазин @Азазин

August 2022 1 3 Report

sin(-5пи/6)+ sin(пи/6)+sinпи+sin(-пи/4)

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$sin(-\frac{5\pi}{6})+sin\frac{\pi}{6}+sin\pi +sin(-\frac{\pi}{4})=-sin(\pi -\frac{\pi}{6})+\frac{1}{2}+0-sin\frac{\pi}{4}=\\\\=-sin\frac{\pi}{6}+\frac{1}{2}-\frac{\sqrt2}{2}=-\frac{1}{2}+\frac{1}{2}-\frac{\sqrt2}{2}=-\frac{\sqrt2}{2}$

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