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\input{preamble-standalone.ltx}
\begin{document}

% Ex. No. 58 (Section 12.6 : Scarabaeus  Curve)

\begin{tikzpicture}[scale=2.5]
	\tkzInit [xmin=-5,xmax=5,ymin=-5,ymax=5,xstep=1,ystep=1]
	\tkzFctPolar[domain=0:2*pi,samples=400]{1.6*cos(2*t)-3*cos(t) }
	\end{tikzpicture}

\end{document}