СРОЧНО!!! ПОМОГИТЕ!!!

Question

СРОЧНО!!! ПОМОГИТЕ!!!

Answer 1

[cosx≤-√3/2⇒5π/6+2πn≤x≤7π/6+2πn,n∈z
[cosx≥√3/2⇒-π/6+2πn≤x≤π/6+2πn,n∈z
x∈[5π/6+2πn;7π/6+2πn,n∈z] U [-π/6+2πn≤π/6+2πn,n∈z]

Comments

спасибо большое!