Question

Cosx<=-0,5 решите это

Answer 1

cosx ≤ -1/2
arccos(-1/2) + 2πn ≤ x ≤ 2π - arccos((-1/2) + 2πn, n∈Z
2π/3  + 2πn ≤ x ≤ 2π/3  + 2πn, n∈Z
2π/3  + 2πn ≤ x ≤ 4π/3  + 2πn, n∈Z