php-doc-en/reference/math/functions/sin.xml
2003-12-15 16:55:22 +00:00

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<?xml version="1.0" encoding="iso-8859-1"?>
<!-- $Revision: 1.6 $ -->
<!-- splitted from ./en/functions/math.xml, last change in rev 1.2 -->
<refentry id="function.sin">
<refnamediv>
<refname>sin</refname>
<refpurpose>Sine</refpurpose>
</refnamediv>
<refsect1>
<title>Description</title>
<methodsynopsis>
<type>float</type><methodname>sin</methodname>
<methodparam><type>float</type><parameter>arg</parameter></methodparam>
</methodsynopsis>
<para>
<function>sin</function> returns the sine of the <parameter>arg</parameter>
parameter. The <parameter>arg</parameter> parameter is in radians.
</para>
<para>
<informalexample>
<programlisting role="php">
<![CDATA[
<?php
// Precision depends on your precision directive
echo sin(deg2rad(60)); // 0.866025403 ...
echo sin(60); // -0.304810621 ...
?>
]]>
</programlisting>
</informalexample>
</para>
<para>
See also <function>asin</function>, <function>cos</function>,
<function>tan</function> and <function>deg2rad</function>.
</para>
</refsect1>
</refentry>
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