θ=
π
4
;τ=13.33;ϵ=0.021;α=1;​​σ=ArcCos
ω
Sin[θ-ωτ]ϵ
(1+
2
α
)
​​​​​​Δ=2Cos[θ-ωτ]ϵ
(1+
2
α
)
Sin[σ];​​​​n=Δτ;​​m=ωτ;​​​​
ArcCos33.6718ωCsc
π
4
-13.33ω
ParametricPlot[{n,m},{ω,-2π,2π},FrameTrue,FrameLabel{"Δτ","ω τ"},PlotRange{{-0.58,0.58},{-0.32,0.22}},PlotPoints500]​​​​​​
​