\begin{center}
\setlength{\unitlength}{0.75cm}
 \begin{Picture}(-11,-6)(11,6)
\cartesianaxes(-10,-5)(10,5)
\PRODUCTfunction{\IDENTITYfunction}{\COSfunction}{%
                            \Ffunction}
\PRODUCTfunction{\Ffunction}{\SINfunction}{\Gfunction}
\pictcolor{red}
\PlotFunction[40]{\Gfunction}{-10}{10}
\end{Picture}
\end{center}
