Помогитее( 2cos x+√3=0

Question

Помогитее( 2cos x+√3=0

Answer 1

2cosx+√3=0 ⇒cosx=-√3/2 ⇒
x₁=+5π/6+2kπ;k∈Z;
x₂=-5π/6+2kπ;k∈Z.