dimanchyck2000 Х + π/6 = arccos(√3/2) + 2πn, n є Z
x + π/6 = ±π/6 + 2πn, n є Z
x = 2πn, n є Z
x = -π/3 + 2πn, n є Z
Ответ: x = 2πn, n є Z; x = -π/3 + 2πn, n є Z