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Clarify the description, include an example, and See also: deg2rad().
git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@84361 c90b9560-bf6c-de11-be94-00142212c4b1
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<?xml version="1.0" encoding="iso-8859-1"?>
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<!-- $Revision: 1.2 $ -->
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<!-- $Revision: 1.3 $ -->
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<!-- splitted from ./en/functions/math.xml, last change in rev 1.2 -->
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<refentry id="function.sin">
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<refnamediv>
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<methodparam><type>float</type><parameter>arg</parameter></methodparam>
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</methodsynopsis>
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<para>
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Returns the sine of arg in radians.
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<function>sin</function> returns the sine of the <parameter>arg</parameter>
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parameter. The <parameter>arg</parameter> parameter is in radians.
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</para>
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<para>
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See also <function>cos</function> and <function>tan</function>.
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<informalexample>
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<programlisting>
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<![CDATA[
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<?php
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// Precision depends on your precision directive
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print sin(deg2rad(60)); // 0.866025403 ...
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print sin(60); // -0.304810621 ...
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?>
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]]>
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</programlisting>
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</informalexample>
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</para>
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<para>
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See also <function>cos</function>, <function>tan</function>
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and <function>deg2rad</function>.
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</para>
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</refsect1>
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</refentry>
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