Question

cos(5пи:3-x)+cosx преобразовать выражение

Answer 1

cos(5π/3-x)+cosx = cos5π/3· cosx + sin5π/3·sinx + cosx = 0.5 cosx - 0.5√3·sinx + cosx=

= 1.5cosx - 0.5√3·sinx