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+%% 
+%%  Ein Beispiel der DANTE-Edition
+%%  
+%%  2. Auflage
+%% 
+%%  Beispiel 15-04-69 auf Seite 809.
+%% 
+%%  Copyright (C) 2016 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[]{exaarticle}
+\pagestyle{empty}
+\setlength\textwidth{145.16928pt}
+\usepackage[T1]{fontenc}
+%StartShownPreambleCommands
+\usepackage{pgfplots}
+%StopShownPreambleCommands
+\begin{document}
+\begin{tikzpicture}[scale=0.5]
+\begin{axis}[xmin=-1.5708,xmax=1.6,
+  ymin=-10,ymax=10,
+  xtick={-1.5708,...,1.5708},
+  xticklabels={$-\pi/2$,$\pi/2$},
+  axis x line=center,axis y line=center,
+  no markers,samples=100]
+\addplot gnuplot[domain=
+  -0.5*pi+0.003: 0.5*pi-0.003] {tan(x)};
+\end{axis}
+\end{tikzpicture}
+\end{document}