f(x)=sin²ωx+2√3sinωxcosωx-cos²wx+λ
=（sin²ωx-cos²wx）+2√3sinωxcosωx+λ
=-cos2ωx+√3sin2ωx+λ
=2sin(2ωx-30°)+λ
T=2π/(2ω)=π/ω