%% 
%%  A DANTE-Edition example
%% 
%%  Example 12-01-4 on page 141.
%% 
%%  Copyright (C) 2011 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[]{article}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}
\setlength\parindent{0pt}

\usepackage{pst-plot}\SpecialCoor

\begin{document}
\begin{pspicture}(0,-1)(5,1)
  \psaxes{->}(0,0)(0,-1)(5,1)
  \psline(0,0)(*Pi {sqrt(abs(cos(x)))})
  \psline{<->}(*Pi {cos(x)})(*5 {sin(x)*cos(x)})
\end{pspicture}
\end{document}
