%% 
%%  A DANTE-Edition example
%% 
%%  Example 12-01-2 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{129.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks}\SpecialCoor

\begin{document}
\begin{pspicture}[showgrid](0,1)(3,3)
 \psset{dotscale=2,xunit=2,yunit=1.5}
 \psdot(2;45)
 \psdot[linecolor=cyan](!2 45 cos mul 2 45 sin mul)
 \psset{dotstyle=triangle*}
 \psdot(1.5;70)
 \psdot[linecolor=cyan](!1.5 70 cos mul 1.5 70 sin mul)
\end{pspicture}
\end{document}