%% 
%%  A DANTE-Edition example
%% 
%%  Example 15-05-2 on page 224.
%% 
%%  Copyright (C) 2011 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}

\usepackage{pst-plot,pst-node}

\begin{document}
\psset{arrowscale=2,unit=1.1cm}
  \begin{pspicture}(-1.2,-1.5)(1.2,1.5)
    \psaxes[ticks=y,linecolor=red,subticks=1,
    labelFontSize=\footnotesize,mathLabel=false]{->}(0,0)(-1,-1.25)(1,1.25)
    \uput[-90](1.1,0){x}
    \uput[180](0,1.1){y}
    \pscircle(0,0){1}
    \psplot[linewidth=1pt]{0}{1}{x}
    \psarc[linewidth=1pt](0,0){0.5}{0}{45}
    \rput[bl](0.12,0.04){$\alpha$}
    \psline[linecolor=green](0.70,0)(0.7,0.70)%sine
    \psline[linecolor=blue](0,0)(0.70,0)%cosine
    \pnode(0.7,0.70){A}
  \end{pspicture}
%
  \begin{pspicture}(-3.14,-1.5)(4.71,1.5)
    \psaxes[xunit=1.570796327,showorigin=false,ticks=all,tickcolor=red,linecolor=red,
    trigLabels=true,labelFontSize=\footnotesize,mathLabel=false]{->}(0,0)(-2,-1.5)(3.14,1.5)
    \psplot[plotstyle=line,linewidth=1pt,linecolor=green]{-3.14}{3.14}{x 180 mul 3.14 div sin}
    \psplot[plotstyle=line,linewidth=1pt,linecolor=blue]{-3.14}{3.14}{x 180 mul 3.14 div cos}
    \psline[linecolor=red]{-}(0.7,0)(0.7,0.7)
    \pcline[linestyle=dashed,linewidth=0.2pt](A)(0.7,0.7)
    \uput[-90](0.70,0){$arc(\alpha)$}
    \uput[-90](5,0){x}
    \uput[180](0,1.4){y}
  \end{pspicture}
\end{document}