2cosx/3=-1решите уравнение

Question

2cosx/3=-1
решите уравнение

Answer 1

Cosx/3=-1/2
x/3=+- arccos(-1/2) + 2πk, k∈Z
x/3=+-2π/3+2πk, k∈Z
x=+-2π+6πk, k∈Z