php-doc-en/reference/math/functions/sin.xml
2020-12-26 19:26:31 +00:00

91 lines
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XML

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.sin" xmlns="http://docbook.org/ns/docbook">
<refnamediv>
<refname>sin</refname>
<refpurpose>Sine</refpurpose>
</refnamediv>
<refsect1 role="description">
&reftitle.description;
<methodsynopsis>
<type>float</type><methodname>sin</methodname>
<methodparam><type>float</type><parameter>num</parameter></methodparam>
</methodsynopsis>
<para>
<function>sin</function> returns the sine of the <parameter>num</parameter>
parameter. The <parameter>num</parameter> parameter is in radians.
</para>
</refsect1>
<refsect1 role="parameters">
&reftitle.parameters;
<para>
<variablelist>
<varlistentry>
<term><parameter>num</parameter></term>
<listitem>
<para>
A value in radians
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 role="returnvalues">
&reftitle.returnvalues;
<para>
The sine of <parameter>num</parameter>
</para>
</refsect1>
<refsect1 role="examples">
&reftitle.examples;
<para>
<example>
<title><function>sin</function> example</title>
<programlisting role="php">
<![CDATA[
<?php
// Precision depends on your precision directive
echo sin(deg2rad(60)); // 0.866025403 ...
echo sin(60); // -0.304810621 ...
?>
]]>
</programlisting>
</example>
</para>
</refsect1>
<refsect1 role="seealso">
&reftitle.seealso;
<para>
<simplelist>
<member><function>asin</function></member>
<member><function>sinh</function></member>
<member><function>cos</function></member>
<member><function>tan</function></member>
<member><function>deg2rad</function></member>
</simplelist>
</para>
</refsect1>
</refentry>
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