<?xml version="1.0" encoding="UTF-8"?>

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<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="acosd" xml:lang="ja">

    <refnamediv>

        <refname>acosd</refname>

        <refpurpose>要素毎の逆余弦, 結果は度.</refpurpose>

    </refnamediv>

    <refsynopsisdiv>

        <title>呼び出し手順</title>

        <synopsis>t=acosd(x)</synopsis>

    </refsynopsisdiv>

    <refsection>

        <title>引数</title>

        <variablelist>

            <varlistentry>

                <term>x</term>

                <listitem>

                    <para>実数または複素数のベクトルまたは行列.</para>

                </listitem>

            </varlistentry>

            <varlistentry>

                <term>t</term>

                <listitem>

                    <para>実数または複素数のベクトルまたは行列.</para>

                </listitem>

            </varlistentry>

        </variablelist>

    </refsection>

    <refsection>

        <title>説明</title>

        <para>

            <literal>t</literal> の要素は,

            <literal>x</literal>の各エントリの

            逆余弦(単位:度)となります(t=acos(x)*180/%pi).

            実数の入力データは<literal> [-1, 1]</literal>の範囲です.

            結果は実数で<literal>[0 180].</literal>の範囲となります.

        </para>

    </refsection>

    <refsection>

        <title>サンプル</title>

        <scilab:image>

            x=-0.99:0.1:0.99;

            plot(x,acosd(x))

        </scilab:image>

    </refsection>

    <refsection>

        <title>例</title>

        <programlisting role="example"><![CDATA[
x=[-1 0 1 sqrt(2)/2 -sqrt(2)/2 sqrt(3)/2 -sqrt(3)/2];
acosd(x)
 ]]></programlisting>

    </refsection>

    <refsection>

        <title>参考</title>

        <simplelist type="inline">

            <member>

                <link linkend="acos">acos</link>

            </member>

            <member>

                <link linkend="cos">cos</link>

            </member>

        </simplelist>

    </refsection>

</refentry>

