Помогите пожалуйста....................................................

y`=-2√3sinx+2cosx-2=0√3sinx-cosx=-12(√3/2sinx-1/2cosx)=-1sin(x-π/6)=-1/2x-π/6=-π/6+2πn U x-π/6=7π/6+2πkx=2πn,n∈z U x=4π/3+2πk,k∈z