Решите тригонометрическое неравенство

cos (x/3+pi/3) <=cos5pi/3

Cos (x/3 + π/3) ≤ cos (5π/3)

cos (x/3 + π/3) ≤ 1/2

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

π/3 + 2πn ≤ (x/3 + π/3) ≤ 2π - π/3 + 2πn, n∈Z

π/3 + 2πn ≤ (x/3 + π/3) ≤ 5π/3 + 2πn, n∈Z

π/3 - π/3 + 2πn ≤ (x/3) ≤ 5π/3 - π/3 + 2πn, n∈Z

2πn ≤ (x/3) ≤ 4π/3 + 2πn, n∈Z

6πn ≤ x ≤ 4π + 6πn, n∈Z