<?xml version="1.0" encoding="UTF-8"?>
<refentry 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" xmlns:scilab="http://www.scilab.org" xml:id="cosm" xml:lang="fr">
    <refnamediv>
        <refname>cosm</refname>
        <refpurpose>cosinus matriciel</refpurpose>
    </refnamediv>
    <refsynopsisdiv>
        <title>Séquence d'appel</title>
        <synopsis>t=cosm(x)</synopsis>
    </refsynopsisdiv>
    <refsection>
        <title>Paramètres</title>
        <variablelist>
            <varlistentry>
                <term>x,t</term>
                <listitem>
                    <para>matrice réelle ou complexe</para>
                </listitem>
            </varlistentry>
        </variablelist>
    </refsection>
    <refsection>
        <title>Description</title>
        <para>
            <literal>cosm(x)</literal> est le cosinus matriciel de la matrice x.
            <literal>t=0.5*(expm(%i*x)+expm(-%i*x))</literal>.
        </para>
    </refsection>
    <refsection>
        <title>Exemples</title>
        <programlisting role="example"><![CDATA[
A=[1,2;3,4]
cosm(A)-0.5*(expm(%i*A)+expm(-%i*A))
 ]]></programlisting>
    </refsection>
    <refsection role="see also">
        <title>Voir aussi</title>
        <simplelist type="inline">
            <member>
                <link linkend="cos">cos</link>
            </member>
            <member>
                <link linkend="expm">expm</link>
            </member>
        </simplelist>
    </refsection>
</refentry>
