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%
% tkz-euclide (14/01/2011)
%
% Coding (utf8) Creator (TeX) Producer (pdfeTeX)
% Author Alain Matthes
\input{tkzfctpreamble.ltx}
\begin{document}
\begin{tikzpicture}
\tkzInit[xmin=-7,xmax=7,ymin=-1,ymax=1]
\tkzAxeY[gradsize=\scriptstyle]
\tkzAxeX[trig=2]
\foreach\v in {-2,-1,1,2}
{\tkzVLine[color=red]{\v*\FPpi}}
\end{tikzpicture}
\end{document}
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