Cos(3x-π/3)>√2/4:1/2 cos(3x-π/3)>√2/4*2 cos(3x-π/3)>√2/2 -π/4+2πn<3x-π/3<π/4+2πn -π/4+π/3+2πn<3x<π/4+π/3+2πn π/12+2πn<3x<7π/12+2πn π/36+2πn/3<x<7π/36+2πn/3 Ответ х∈(π/36+2πn/3;7π/36+2πn/3)
