СРОЧНО!!! ПОМОГИТЕ!!!
[tex]|cosx| \geq \frac{ \sqrt{3} }{2} [/tex]

спасибо большое!

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