Question

Cos(x+П)=1/2 Помогите решить пожалцйста

Answer 1

cos(x+π)=1/2
x+π=π/3
x=π/3-π=(π-3π)/3=-2π/3

Answer 2

-sinx = 1/2
sinx = -1/2
1) х = - π/6 + 2πn, n∈Z
2) x = -5π/6 + 2πn, n∈Z