How can I plot a graph of
Sin[\[CurlyPhi][\[Tau], \[Xi]]]
when
\[Tau]0[t_Real] := K1 t/(\[Gamma] L^2)
the values of t, K1, gamma and L are given and
[\[CurlyPhi][\[Tau], \[Xi]]
is the solution of this equation
Eq1 = (K + \[CapitalDelta] (Sin[\[CurlyPhi][\[Tau], \[Xi]]] Sin[\
\[CurlyPhi][\[Tau], \[Xi]]])) D[\[CurlyPhi][\[Tau], \[Xi]], {\[Xi],
2}] + 0.5 \[CapitalDelta] (Sin[2*\[CurlyPhi][\[Tau], \[Xi]]] (
D[\[CurlyPhi][\[Tau], \[Xi]], \[Xi]] D[\[CurlyPhi][\[Tau], \
\[Xi]], \[Xi]])) +
d P (2 \[Xi] -
1) (\[Alpha] Sin[\[CurlyPhi][\[Tau], \[Xi]]] Sin[\[CurlyPhi][\
\[Tau], \[Xi]]] - 1) - D[\[CurlyPhi][\[Tau], \[Xi]], \[Tau]] == 0;