СРОЧНО, ПОМОГИТЕ, ПОЖАЛУЙСТА, ЛЮДИ ДОБРЫЕ!!!. Created by lera147852s. algebra-ru

СРОЧНО, ПОМОГИТЕ, ПОЖАЛУЙСТА, ЛЮДИ ДОБРЫЕ!!!...

October 2021 1 29 Report

СРОЧНО, ПОМОГИТЕ, ПОЖАЛУЙСТА, ЛЮДИ ДОБРЫЕ!!!

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karasikov $cosx - sin x = cosx + cos(\frac{ \pi }{2} + x) = 2cos\frac{2x + \frac{ \pi }{2}}{2}cos(-\frac{ \pi }{4})= \\ =2 * \frac{\sqrt2}{2}*cos(x + \frac{\pi}{4}) = \sqrt2cos(x + \frac{\pi}{4})$

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