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I have a two function as f[\[Alpha]_, \[Gamma]_, u_] := Cosh[u]*Sqrt[1 – [([Sin[\[Alpha]]*Sinh[u]]^2)]/[Sqrt[1 – \[Gamma]]*Cosh[u] + Cos[\[Alpha]]]^2]; b[\[Alpha]_, \[Gamma]_,u_] := -1*[[[Sinh[u]]^2*Sin[\[Alpha]]]/(Sqrt[[1 – \[Gamma]]] Cosh[u] + Cos[\[Alpha]])]; and now i want to do parametric plot as ParametricPlot[f[8*\[Pi]/5, 0.15, u] , b[8*\[Pi]/5, 0.15, u], {u, -2, 2}] i am not getting any plotRead more