[doc] comparisons page improved
[scilab.git] / scilab / modules / elementary_functions / help / fr_FR / trigonometry / acosm.xml
1 <?xml version="1.0" encoding="UTF-8"?>
2 <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="acosm" xml:lang="fr">
3     <refnamediv>
4         <refname>acosm</refname>
5         <refpurpose>cosinus matriciel inverse</refpurpose>
6     </refnamediv>
7     <refsynopsisdiv>
8         <title>Séquence d'appel</title>
9         <synopsis>t=acosm(x)</synopsis>
10     </refsynopsisdiv>
11     <refsection>
12         <title>Paramètres</title>
13         <variablelist>
14             <varlistentry>
15                 <term>x</term>
16                 <listitem>
17                     <para>matrice carrée complexe ou réelle</para>
18                 </listitem>
19             </varlistentry>
20             <varlistentry>
21                 <term>t</term>
22                 <listitem>
23                     <para>matrice carrée complexe ou réelle</para>
24                 </listitem>
25             </varlistentry>
26         </variablelist>
27     </refsection>
28     <refsection>
29         <title>Description</title>
30         <para>
31             <literal>t</literal> est le cosinus matriciel inverse de la matrice
32             <literal>x</literal>. La méthode de diagonalisation est utilisée. Pour les
33             matrices non symétriques le résultat peut être imprécis. On a
34             <literal>t=-%i*logm(x+%i*sqrtm(eye()-x*x))</literal>
35         </para>
36     </refsection>
37     <refsection>
38         <title>Exemples</title>
39         <programlisting role="example"><![CDATA[
40 A=[1,2;3,4];
41 cosm(acosm(A))
42  ]]></programlisting>
43     </refsection>
44     <refsection role="see also">
45         <title>Voir aussi</title>
46         <simplelist type="inline">
47             <member>
48                 <link linkend="acos">acos</link>
49             </member>
50             <member>
51                 <link linkend="sqrtm">sqrtm</link>
52             </member>
53             <member>
54                 <link linkend="logm">logm</link>
55             </member>
56         </simplelist>
57     </refsection>
58 </refentry>