%% 
%%  A DANTE-Edition example
%% 
%% 
%%  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{201.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks,pst-plot}

\begin{document}
\begin{pspicture}(-4,-4)(4,4)
  \psplot[plotpoints=1000,linecolor=blue,
    linewidth=1.5pt]{-4}{4}{x dup RadtoDeg 16 mul 3.14 div cos mul}
  \psline[linecolor=red](-4,-4)(4,4)
  \psline[linecolor=red](-4,4)(4,-4)
  \psaxes{->}(0,0)(-4,-4)(4,4)
  \uput[-90](4,0){$x$} \uput[0](0,4){$y$}
\end{pspicture}
\end{document}