Помогите решить tg(x+2y) sin(x-2y) cos(2x-2,5y) tg(x-2y). Created by irinuhk. matematika-ru

Помогите решить tg(x+2y) sin(x-2y) cos(2x-2,5y) tg(x-2y)...

November 2021 1 23 Report

Помогите решить
tg(x+2y)
sin(x-2y)
cos(2x-2,5y)
tg(x-2y)

Answers & Comments

julyap $1)tg(x+2y)= \frac{tgx+tg2y}{1-tgxtg2y} \\ \\ 2)sin(x-2y)=sinxcos2y-cosxsin2y \\ \\ 3)cos(2x-2.5y)=cos2xcos2.5y+sin2xsin2.5y\\\\4)tg(x-2y)= \frac{tgx-tg2y}{1+tgxtg2y} \\ \\$

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