Big-Data-HPC-Platform/docs/ECLLanguageReference/ECLR_mods/BltInFunc-ACOS.xml

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<!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
<sect1 id="ACOS">
  <title>ACOS</title>

  <para><emphasis role="bold">ACOS<indexterm>
      <primary>ACOS</primary>
    </indexterm><indexterm>
      <primary>ACOS function</primary>
    </indexterm>(</emphasis><emphasis>cosine</emphasis><emphasis
  role="bold">)</emphasis></para>

  <para><informaltable colsep="1" frame="all" rowsep="1">
      <tgroup cols="2">
        <colspec colwidth="79.35pt" />

        <colspec colwidth="309.45pt" />

        <tbody>
          <row>
            <entry><emphasis>cosine</emphasis></entry>

            <entry>The REAL cosine value for which to find the
            arccosine.</entry>
          </row>

          <row>
            <entry>Return:</entry>

            <entry>ACOS returns a single REAL value.</entry>
          </row>
        </tbody>
      </tgroup>
    </informaltable></para>

  <para>The <emphasis role="bold">ACOS </emphasis>function returns the
  arccosine (inverse) of the <emphasis>cosine</emphasis>, in radians.</para>

  <para>Example:</para>

  <programlisting>ArcCosine := ACOS(CosineAngle);
</programlisting>

  <para>See Also: <link linkend="COS">COS</link>, <link linkend="SIN">SIN</link>, <link linkend="TAN">TAN</link>, <link linkend="ASIN">ASIN</link>, <link linkend="ATAN">ATAN</link>, <link linkend="COSH">COSH</link>, <link linkend="SINH">SINH</link>, <link linkend="TANH">TANH</link></para>
</sect1>