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Dai Jie
92e38e590d
git-svn-id: https://svn.php.net/repository/phpdoc/zh/trunk@327985 c90b9560-bf6c-de11-be94-00142212c4b1
89 lines
2.3 KiB
XML
Executable File
89 lines
2.3 KiB
XML
Executable File
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<!-- $Author$ -->
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<!-- EN-Revision: 96c9d88bad9a7d7d44bfb7f26c226df7ee9ddf26 Maintainer: dallas Status: ready -->
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<refentry xml:id="function.atan2" xmlns="http://docbook.org/ns/docbook">
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<refnamediv>
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<refname>atan2</refname>
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<refpurpose>两个参数的反正切</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>float</type><methodname>atan2</methodname>
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<methodparam><type>float</type><parameter>y</parameter></methodparam>
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<methodparam><type>float</type><parameter>x</parameter></methodparam>
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</methodsynopsis>
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<simpara>
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本函数计算两个变量
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<parameter>x</parameter> 和 <parameter>y</parameter>
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的反正切值。和计算
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<parameter>y</parameter> / <parameter>x</parameter>
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的反正切相似，只除了两个参数的符号是用来确定结果的象限之外。
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</simpara>
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<simpara>
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本函数的结果为弧度，其值在 -PI
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和 PI 之间（包括 -PI 和 PI）。
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</simpara>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>y</parameter></term>
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<listitem>
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<para>
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Dividend parameter
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>x</parameter></term>
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<listitem>
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<para>
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Divisor parameter
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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<parameter>x</parameter> 和 <parameter>y</parameter>
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的反正切弧度值。
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</para>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>atan</function></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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