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<?xml version="1.0" encoding="UTF-8"?>
<!--
* Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
* Copyright (C) 2008 - INRIA
*
* This file must be used under the terms of the CeCILL.
* This source file is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at
* http://www.cecill.info/licences/Licence_CeCILL_V2-en.txt
*
-->
<refentry version="5.0-subset Scilab" xml:id="sec" xml:lang="fr"
xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns:ns5="http://www.w3.org/1999/xhtml"
xmlns:mml="http://www.w3.org/1998/Math/MathML"
xmlns:db="http://docbook.org/ns/docbook">
<info>
<pubdate>$LastChangedDate$</pubdate>
</info>
<refnamediv>
<refname>sec</refname>
<refpurpose>sécante des éléments de l'argument.</refpurpose>
</refnamediv>
<refsynopsisdiv>
<title>Séquence d'appel</title>
<synopsis>y=sec(x)</synopsis>
</refsynopsisdiv>
<refsection>
<title>Paramètres</title>
<variablelist>
<varlistentry>
<term>x</term>
<listitem>
<para>Tableau réel ou complexe.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>y</term>
<listitem>
<para>Tableau réel ou complexe de même dimension que
<literal>x</literal>.</para>
</listitem>
</varlistentry>
</variablelist>
</refsection>
<refsection>
<title>Description</title>
<para>Les éléments de <literal>y</literal> sont les sécantes
(<literal>1/cos</literal>) des éléments correspondants de
<literal>x</literal>. Pour les éléments réels, les résultats sont réels et
dans <literal>]-%inf -1] U [1 %inf[</literal>.</para>
</refsection>
<refsection>
<title>Exemples</title>
<programlisting role="example"><![CDATA[
x=[0 %pi/3 2*%pi/3 %pi/4 3*%pi/4 %pi/6 5*%pi/6 %pi];
sec(x)
x=linspace(-%pi,%pi,100)
plot(x,sec(x))
]]></programlisting>
</refsection>
<refsection>
<title>Voir aussi</title>
<simplelist type="inline">
<member><link linkend="secd">secd</link></member>
<member><link linkend="cos">cos²</link></member>
</simplelist>
</refsection>
<refsection>
<title>Auteurs</title>
<simplelist type="vert">
<member>Serge Steer, INRIA</member>
</simplelist>
</refsection>
</refentry>
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