%% 
%%  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}
\def\pshlabel#1{\footnotesize#1} \def\psvlabel#1{\footnotesize#1}
\def\dt{\ensuremath{\,\mathrm{d}t}}

\usepackage{pstricks,pst-func}

\begin{document}
\psset{xunit=0.75}
\begin{pspicture}(-0.25,-2)(15,2) \psaxes[dx=1cm,Dx=2]{->}(0,0)(-0.25,-2)(15,2)
  \psplot[plotpoints=500]{0.01}{14.5}{ x RadtoDeg sin x div }
  \psSi[plotpoints=500,linecolor=red,linewidth=1pt]{0.01}{14.5}
  \pssi[plotpoints=500,linecolor=blue,linewidth=1pt]{0.01}{14.5}
  \rput(5,1){\color{red}$Si(x)=\int\limits_{0}^x \frac{\sin(t)}{t}\dt$}
  \rput(4.5,-1.5){\color{blue}$si(x)=-\int\limits_{x}^{\infty}
     \frac{\sin(t)}{t}\dt=Si(x)-\frac{\pi}{2}$}
  \rput(8,.5){$f(x)= \frac{\sin(t)}{t}$}
\end{pspicture}
\end{document}
