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<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
-
- This file is part of the OpenLink Software Virtuoso Open-Source (VOS)
- project.
-
- Copyright (C) 1998-2018 OpenLink Software
-
- This project is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; only version 2 of the License, dated June 1991.
-
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-
-
-->
<refentry id="fn_acos">
<refmeta>
<refentrytitle>trigonometric</refentrytitle>
<refmiscinfo>number</refmiscinfo>
</refmeta>
<refnamediv>
<refname>acos</refname>
<refname>asin</refname>
<refname>atan</refname>
<refname>cos</refname>
<refname>sin</refname>
<refname>tan</refname>
<refname>cot</refname>
<refname>degrees</refname>
<refname>radians</refname>
<refname>atan2</refname>
<refname>pi</refname>
<refpurpose>trigonometric functions</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis id="fsyn_acos">
<funcprototype id="fproto_acos">
<funcdef><function>acos</function></funcdef>
<paramdef>in <parameter>x</parameter> double precision</paramdef>
</funcprototype>
</funcsynopsis>
<funcsynopsis id="fsyn_asin">
<funcprototype id="fproto_asin">
<funcdef><function>asin</function></funcdef>
<paramdef>in <parameter>x</parameter> double precision</paramdef>
</funcprototype>
</funcsynopsis>
<funcsynopsis id="fsyn_atan">
<funcprototype id="fproto_atan">
<funcdef><function>atan</function></funcdef>
<paramdef>in <parameter>x</parameter> double precision</paramdef>
</funcprototype>
</funcsynopsis>
<funcsynopsis id="fsyn_cos">
<funcprototype id="fproto_cos">
<funcdef><function>cos</function></funcdef>
<paramdef>in <parameter>x</parameter> double precision</paramdef>
</funcprototype>
</funcsynopsis>
<funcsynopsis id="fsyn_sin">
<funcprototype id="fproto_sin">
<funcdef><function>sin</function></funcdef>
<paramdef>in <parameter>x</parameter> double precision</paramdef>
</funcprototype>
</funcsynopsis>
<funcsynopsis id="fsyn_tan">
<funcprototype id="fproto_tan">
<funcdef><function>tan</function></funcdef>
<paramdef>in <parameter>x</parameter> double precision</paramdef>
</funcprototype>
</funcsynopsis>
<funcsynopsis id="fsyn_cot">
<funcprototype id="fproto_cot">
<funcdef><function>cot</function></funcdef>
<paramdef>in <parameter>x</parameter> double precision</paramdef>
</funcprototype>
</funcsynopsis>
<funcsynopsis id="fsyn_degrees">
<funcprototype id="fproto_degrees">
<funcdef><function>degrees</function></funcdef>
<paramdef>in <parameter>x</parameter> double precision</paramdef>
</funcprototype>
</funcsynopsis>
<funcsynopsis id="fsyn_radians">
<funcprototype id="fproto_radians">
<funcdef><function>radians</function></funcdef>
<paramdef>in <parameter>x</parameter> double precision</paramdef>
</funcprototype>
</funcsynopsis>
<funcsynopsis id="fsyn_atan2">
<funcprototype id="fproto_atan2">
<funcdef><function>atan2</function></funcdef>
<paramdef>in <parameter>x</parameter> double precision</paramdef>
<paramdef>in <parameter>y</parameter> double precision</paramdef>
</funcprototype>
</funcsynopsis>
<funcsynopsis id="fsyn_pi">
<funcprototype id="fproto_pi">
<funcdef><function>pi</function></funcdef>
<paramdef></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1 id="desc"><title>Description</title>
<para>
All these functions work with double precision floating point numbers.
They convert their argument to an IEEE 64-bit float and return a result of that
type.
</para>
<programlisting>
: acos arc cosine
: asin arc sine
: atan arc tangent
: cos cosine
: sin sine
: tan tangent
: cot cotangent
: degrees convert an angle in radians to degrees.
: radians convert an angle in radians to degrees.
: atan2 arc tangent with x and y coordinates, can return an angle in any quadrant.
: pi return pi.
</programlisting>
</refsect1>
</refentry>
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