%
% tkz-euclide (14/01/2011)
%
% Coding (utf8) Creator (TeX) Producer (pdfeTeX) 
% Author Alain Matthes
\input{tkzfctpreamble.ltx}

\begin{document}

\begin{tikzpicture}[scale=1.25]
   \tkzInit [xmin=-1,xmax=1,
             ymin=-1,ymax=1,
             xstep=.2,ystep=.2]
  \tkzDrawX   \tkzDrawY
  \tkzFctPolar[domain=0:2*pi]{cos(2*t)}
\end{tikzpicture}

\end{document} 
