\def\F{x 3.1415926 div 180 mul dup dup cos exch 2 mul cos add exch 3 mul cos add}
\psset{plotpoints=1001}
\begin{pspicture}(-10,-3)(10,3) \psplot{-10}{10}{\F}
\psset{linecolor=red, arrows=<->}
\psplottangent{0}{1}{\F}
\psplottangent{1}{1}{\F}
\psplottangent{2}{1}{\F}
\psplottangent{3}{1}{\F}
\psplottangent{4}{1}{\F}
\psplottangent{5}{1}{\F}
\psplottangent{-1}{1}{\F}
\psset{linecolor=green, arrowscale=3}
\psplottangent{-2}{3.14}{\F}
\psplottangent{-3.1415926}{.5}{\F}
\end{pspicture}

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Syracuse — Dernière modification : 13 juin 2004 (0.07s - 3781940 - 21 novembre 2008)