Cos(-5)=-0.5 sin(-x/4)=^2/2 tg(-x/3))=^3 ctg(-6x)=-1 - вопрос №85760515054223361 от nikita011278923 04.08.2022 05:22

Question

Математика: Cos(-5)=-0.5 sin(-x/4)=^2/2 tg(-x/3))=^3 ctg(-6x)=-1

nikita011278923 · Answer

Решение:cos 5*π/6 = - cos (π - 5*π/6) = - cos π/6 = - √ 3 / 22) sin (-7*π/4) = sin (-7*π/4 + 2*π) = sin π/4 = √ 2 / 23) tg 11*π/3 = tg(11*π/3 - 4*π) = tg (-π/3) = - tg π/3 = - √ 34) ctg (-3,5*π) = ctg (-3,5*π + 4*π) = ctg π/2 = 0...