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

% Ex. No. 24 (Section  6.2.5 : \tkzname{trig})

\begin{tikzpicture}
  \tkzInit[xmin=0,xmax=5,ymin=-1,ymax=1]
  \tkzDrawX[trig=2]
  \tkzLabelX[trig=2,text=blue,below = 8pt]
\end{tikzpicture}

\end{document}