scilab/modules/elementary_functions/help/pt_BR/trigonometry/cotd.xml

   1 <?xml version="1.0" encoding="UTF-8"?>
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  16 <refentry xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink"
  17           xmlns:svg="http://www.w3.org/2000/svg" xmlns:ns3="http://www.w3.org/1999/xhtml"
  18           xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:db="http://docbook.org/ns/docbook"
  19           xmlns:scilab="http://www.scilab.org" xml:id="cotd" xml:lang="pt">
  20     <refnamediv>
  21         <refname>cotd</refname>
  22         <refpurpose>cotangent elemento a elemento do argumento dado em
  23             graus
  24         </refpurpose>
  25     </refnamediv>
  26     <refsynopsisdiv>
  27         <title>Seqüência de Chamamento</title>
  28         <synopsis>y = cotd(x)</synopsis>
  29     </refsynopsisdiv>
  30     <refsection>
  31         <title>Parâmetros</title>
  32         <variablelist>
  33             <varlistentry>
  34                 <term>x</term>
  35                 <listitem>
  36                     <para>array de reais</para>
  37                 </listitem>
  38             </varlistentry>
  39             <varlistentry>
  40                 <term>y</term>
  41                 <listitem>
  42                     <para>array de reais com as mesmas dimensões que
  43                         <literal>x</literal>.
  44                     </para>
  45                 </listitem>
  46             </varlistentry>
  47         </variablelist>
  48     </refsection>
  49     <refsection>
  50         <title>Descrição</title>
  51         <para>
  52             As entradas <literal>y</literal> são as cotangentes das entradas
  53             correspondentes de <literal>x</literal> supostamente dadas em graus.
  54             <literal>t=cos(x)./sin(x)</literal>. Para entradas iguais a
  55             <literal>n*180</literal> com <literal>n</literal> inteiro, os resultados
  56             são infinitos, enquanto que com <literal>cotg(n*%pi)</literal> o resultado
  57             é grande, pois <literal>%pi</literal> não pode ser representado
  58             exatamente. para entradas iguais a <literal>n*90</literal> com
  59             <literal>n</literal> inteiro e ímpar, o resultado é exatamente 0.
  60         </para>
  61     </refsection>
  62     <refsection>
  63         <title>Exemplos</title>
  64         <programlisting role="example"><![CDATA[
  65 cotd([30 45 60 90])
  66 cotd([-180 -90 0 90 180])
  67  ]]></programlisting>
  68     <screen><![CDATA[
  69 --> cotd([30 45 60 90])
  70  ans  =
  71    1.7320508   1.   0.5773503   0.
  72
  73 --> cotd([-180 -90 0 90 180])
  74  ans  =
  75    Inf   0.   Inf   0.   Inf
  76 ]]></screen>
  77     </refsection>
  78     <refsection role="see also">
  79         <title>Ver Também</title>
  80         <simplelist type="inline">
  81             <member>
  82                 <link linkend="cotg">cotg</link>
  83             </member>
  84             <member>
  85                 <link linkend="coth">coth</link>
  86             </member>
  87             <member>
  88                 <link linkend="tan">tan</link>
  89             </member>
  90             <member>
  91                 <link linkend="tand">tand</link>
  92             </member>
  93         </simplelist>
  94     </refsection>
  95 </refentry>