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%%
%% The LaTeX Companion, 2ed (second printing August 2004)
%%
%% Example 7-6-2 on page 376.
%%
%% Copyright (C) 2004 Frank Mittelbach, Michel Goossens,
%%    Johannes Braams, David Carlisle, and Chris Rowley
%%
%% 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.
%%

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{207.0pt}
\StartShownPreambleCommands
\usepackage{mathptmx}
\StopShownPreambleCommands
\begin{document}
An example showing a trigonometric function:
\[ \sin \frac{\alpha}{2} =
      \pm \sqrt{\frac{1-\cos\alpha}{2}}  \]
The script looks like this: $\mathcal{ABC}$.
\end{document}