\documentclass[12pt,dvips,landscape]{article}
% use latex; dvips; ps2pdf to process
\usepackage{pstricks-add}
\usepackage{geometry}
\topmargin-.75in\textheight7in
\oddsidemargin-.5in\textwidth10.5in
\pagestyle{empty}
\begin{document}
\begin{center}
\Huge\sf Graphs of the sine and cosine function in degrees\\[30pt]
\end{center}

\bigskip

\psset{algebraic, VarStep=true, xAxisLabel=$x$, yAxisLabel=$y$, xlabelFactor=^\circ, Dx=90, plotpoints=101, bordercolor=yellow}%, showpoints=true}
\Large
\begin{center}
\begin{psgraph}{->}(0,0)(-380, -1.5)(380,1.5){10in}{2.2in}
\psplot[linecolor=red, border=2pt]{-360}{360}{sin(x/180*3.14)}
\end{psgraph}
\end{center}

\bigskip

\begin{center}
\begin{psgraph}{->}(0,0)(-380, -1.5)(380,1.5){10in}{2.2in}
\psplot[linecolor=red, border=2pt]{-360}{360}{cos(x/180*3.14)}
\end{psgraph}
\end{center}

\bigskip

\begin{center}\tiny 
Graphs of sine and cosine in degrees --- 
Math Poster 2007 --- 
%Peter Jipsen --- Chapman University --- 
math.chapman.edu
\end{center}
\end{document}