DescriptionJacobi Elliptic Functions (on Jacobi Hyperbola).svg	English: Plot of the Jacobi hyperbola (x2+y2/b2=1, b imaginary) and the twelve Jacobi Elliptic functions pq(u|m) for particular values of angle φ and parameter b. The solid curve is the hyperbola, with m=1-1/(b2) and u=F(φ,m) where F(.|.) is the elliptic integral of the first kind. The dotted curve is the unit circle. For the ds-dc triangle, σ= Sin(φ)Cos(φ).
Date	18 December 2017
Source	Own work
Author	PAR
SVG development InfoField	The SVG code is valid.   This trigonometry was created with Mathematica.   The file size of this SVG trigonometry may be irrationally large because its text has been converted to paths inhibiting translations.

This code is also used https://commons.wikimedia.org/w/File:Jacobi_Elliptic_Functions_(on_Jacobi_Ellipse).svg, but with different input parameters, found at the top of the code. (To copy the code, edit, select and copy)

$Assumptions={True};

(* The parameters *) b=0.7  ;\[Phi]=Chop[JacobiAmplitude[0.60,1-1/b^2]]; (* The Jacobi Ellipse Plot *) b=0.7 I ;\[Phi]=Chop[JacobiAmplitude[0.55,1-1/b^2]]; (* The Jacobi Hyperbola Plot *) m=1-1/b^2; u = Chop[N[u = EllipticF[\[Phi], m]]];

(* The Jacobi Elliptical functions *) sc=Chop[JacobiSC[u,m]]; sn=Chop[JacobiSN[u,m]]; sd=Chop[JacobiSD[u,m]]; cs=Chop[JacobiCS[u,m]]; cn=Chop[JacobiCN[u,m]]; cd=Chop[JacobiCD[u,m]]; ns=Chop[JacobiNS[u,m]]; nc=Chop[JacobiNC[u,m]]; nd=Chop[JacobiND[u,m]]; ds=Chop[JacobiDS[u,m]]; dc=Chop[JacobiDC[u,m]]; dn=Chop[JacobiDN[u,m]];

(* Plotting functions *) Clear[plot$hline,plot$vline,plot$rline] fontsize=18; plot$hline[start_,length_,color_,label_]:=Module[{v,labelpos}, (* Plot a horizontal line with arrowhead and label *) v={{start,0},{start+length,0}}; labelpos=v2+{0,-0.0035}fontsize; Graphics[{Arrowheads[0.04],color,Arrow[v],Inset[Style[label,FontSize->fontsize],labelpos]}] ] plot$vline[start_,length_,color_,label_]:=Module[{v,labelpos},(* Plot a vertical line with label *) v={{start,0},{start,length}}; labelpos=Mean[v]+{0.0025 ,0}fontsize; Graphics[{color,Line[v],Inset[Style[label,FontSize->fontsize],labelpos]}] ] plot$rline[start_,length_,x_,y_,color_,label_]:=Module[{v,r,labelpos}, (* Plot a radial line with arrowhead and label *) r=Sqrt[x^2+y^2]; v={{0,0},{x/r,y/r}length}; (* Dont assume x^2+y^2=length^2, use x/r and y/r as cosine and sine *) labelpos=v2+{-0.004 ,0.0008}fontsize; Graphics[{Arrowheads[0.04],color,Arrow[v],Inset[Style[label,FontSize->fontsize],labelpos]}] ]

(* Plots *)

(* The angle \[Phi] *) r\[Phi]=0.2; Plot\[Phi]=Plot[Sqrt[(r\[Phi]^2-x^2)],{x,r\[Phi] Cos[\[Phi]],r\[Phi]},PlotStyle->{Black},Background->RGBColor[1,1,1,.5]]; (* angle \[Phi] *) \[Phi]pos=(r\[Phi]+0.0033 fontsize){Cos[\[Phi]/2],Sin[\[Phi]/2]}; Plot\[Phi]={Plot\[Phi],Graphics[Text[Style["\[Phi]",FontSize->fontsize],\[Phi]pos]]};

(* The Jacobi curve and the unit circle and the y=1 line *) PlotC=Plot[Sqrt[(1-x^2)],{x,0,1},PlotStyle->{Black,Dotted},Background->RGBColor[1,1,1,.5]]; (* Circle *) PlotJ1=Plot[Sqrt[b^2(1-x^2)],{x,0,Cot[\[Phi]]},PlotStyle->{Black,Thickness[0.007]},Background->None]; (* Ellipse or hyperbola *) PlotJ2=Plot[Sqrt[b^2(1-x^2)],{x,Min[{1,cd}],Max[{1,cd}]},PlotStyle->{Red,Thickness[0.007]},Background->None]; (* Ellipse or hyperbola swept by \[Phi] *) PlotTop=ListPlot[{{0,0},{0,1},{cs,1}},Joined->True,PlotStyle->{Black,Dotted}]; (* Top y=1 dotted line *)

(* The triangles - Just to be sure, it's not assumed that their origin angle is \[Phi] *)

(* cd, sd, nd triangle *) t1={ plot$hline[00,cd,Red,"cd"], plot$vline[cd,sd,Red,"sd"], plot$rline[00,nd,cd,sd,Red,"nd"]};

(* cn, sn, 1 triangle *) t2={ plot$hline[00,cn,Green,"cn"], plot$vline[cn,sn,Green,"sn"], plot$rline[00,01,cn,sn,Green,"1"]};

(* 1,sc,nc triangle *) t3={ plot$hline[00,01,Blue,"1"], plot$vline[01,sc,Blue,"sc"], plot$rline[00,nc,1,sc,Blue,"nc"]};

(* cs,1,ns triangle *) t4={ plot$hline[00,cs,Cyan,"cs"], plot$vline[cs,01,Cyan,"1"], plot$rline[00,ns,cs,1,Cyan,"ns"]};

(* ds, dc, dn/\[Sigma] triangle *) \[Sigma]=Sin[\[Phi]]Cos[\[Phi]]; t5={ plot$hline[00,ds ,Black,"ds"], plot$vline[ds ,dc ,Black,"dc"], plot$rline[00,dn/\[Sigma] ,ds,dc,Black,"dn/\[Sigma]"]};

(* The Legend *) s1=Text[Style["b = "ToString[TraditionalForm[N[b]]],FontSize->fontsize]]; s2=Text[Style["m = "<>ToString[TraditionalForm[Chop[N[m]]]],FontSize->fontsize]]; s3=Text[Style["\[Phi] = "<>ToString[TraditionalForm[N[\[Phi]]]],FontSize->fontsize]]; s4=Text[Style["u = "<>ToString[TraditionalForm[Chop[N[u]]]],FontSize->fontsize,Red]]; tg=TextGrid[{{s1},{s2},{s3},{s4}}];

(* Combine plots and display *) Show[Flatten[{PlotC,Plot\[Phi],PlotJ1,PlotJ2,PlotTop,t5,t4,t3,t2,t1}],PlotRange->All,AspectRatio->Automatic,PlotLabel->Text[Style["Jacobi Elliptic Functions",FontSize->fontsize]],Epilog->Inset[tg,{.27,.45}]]

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