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+%%
+%% Ein Beispiel der DANTE-Edition
+%%
+%% 7. Auflage
+%%
+%% Beispiel 14-01-7 auf Seite 188.
+%%
+%% Copyright (C) 2016 Herbert Voss
+%%
+%% It may be distributed and/or modified under the conditions
+%% of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%%
+%% See http://www.latex-project.org/lppl.txt for details.
+%%
+%%
+%% ====
+% Show page(s) 1
+%%
+%%
+\documentclass[]{exaarticle}
+\pagestyle{empty}
+\setlength\textwidth{352.81416pt}
+\setlength\parindent{0pt}
+%StartShownPreambleCommands
+\usepackage{pst-plot}\psset{unit=0.8cm}
+%StopShownPreambleCommands
+\begin{document}
+\begin{pspicture}(-3.5,-3.5)(3.5,3.5)
+\psaxes[axesstyle=polar](3,0)
+\psplot[polarplot,algebraic,linecolor=blue,linewidth=2pt,
+ plotpoints=2000]{0}{TwoPi 4 mul}{2*(sin(x)-x)/(cos(x)+x)}
+\end{pspicture} \qquad
+\begin{pspicture}(-3.5,-3.5)(3.5,3.5)
+\psaxes[axesstyle=polar,subticklinestyle=dashed,subticks=2,
+ xlabelFontSize=\scriptstyle](3,360)
+\psplot[polarplot,algebraic,linecolor=red,linewidth=2pt,
+ plotpoints=2000]{0}{TwoPi}{6*sin(x)*cos(x)}
+\end{pspicture}
+\end{document}