%% 
%%  A DANTE-Edition example
%% 
%%  Example 03-00-2 on page 32.
%% 
%%  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}
\psset{xunit=2,plotpoints=200,
  plotstyle=dots}
\begin{pspicture}(-1.1,-3.5)(1.2,3.1)
  \psaxes[Dx=0.5]{->}%
    (0,0)(-1,-3.5)(1.2,3)[$x$,-90][$y$,0]
  \rput[l](0.2,2){$f(x)=\arccos x$}
  \psset{yunit=2,xunit=0.5,swapaxes=true}
  \psplot[linecolor=red]{-3.1415}{0}%
    {x RadtoDeg cos}
  \psplot[plotstyle=dots,plotpoints=10]%
      {0}{1.5707}{x RadtoDeg cos}
\end{pspicture}
\end{document}