1 <?xml version=
"1.0" encoding=
"UTF-8"?>
2 <!DOCTYPE book PUBLIC
"-//OASIS//DTD DocBook MathML Module V1.1b1//EN"
3 "http://www.oasis-open.org/docbook/xml/mathml/1.1CR1/dbmathml.dtd">
9 <holder>Khronos Group
</holder>
12 <refentrytitle>atanh
</refentrytitle>
13 <manvolnum>3G
</manvolnum>
16 <refname>atanh
</refname>
17 <refpurpose>return the arc hyperbolic tangent of the parameter
</refpurpose>
19 <refsynopsisdiv><title>Declaration
</title>
22 <funcdef>genType
<function>atanh
</function></funcdef>
23 <paramdef>genType
<parameter>x
</parameter></paramdef>
27 <refsect1 id=
"parameters"><title>Parameters
</title>
30 <term><parameter>x
</parameter></term>
33 Specify the value whose arc hyperbolic tangent to return.
39 <refsect1 id=
"description"><title>Description
</title>
41 <function>atanh
</function> returns the arc hyperbolic tangent of
42 <inlineequation><mml:math><mml:mi mathvariant=
"italic">x
</mml:mi></mml:math></inlineequation>;
43 the inverse of
<citerefentry><refentrytitle>tanh
</refentrytitle></citerefentry>. Results
44 are undefined if
<inlineequation><mml:math><mml:apply><mml:gt /><mml:apply><mml:abs /><mml:mi mathvariant=
"italic">x
</mml:mi></mml:apply><mml:mn>1</mml:mn></mml:apply></mml:math></inlineequation>.
47 <refsect1 id=
"versions"><title>Version Support
</title>
48 <informaltable frame=
"topbot">
53 <entry>atanh
</entry>#newin11#
59 <refsect1 id=
"seealso"><title>See Also
</title>
61 <citerefentry><refentrytitle>sin
</refentrytitle></citerefentry>,
62 <citerefentry><refentrytitle>cos
</refentrytitle></citerefentry>,
63 <citerefentry><refentrytitle>sinh
</refentrytitle></citerefentry>,
64 <citerefentry><refentrytitle>cosh
</refentrytitle></citerefentry>
67 <refsect1 id=
"Copyright"><title>Copyright
</title>
69 Copyright
<trademark class=
"copyright"></trademark> 2011 Khronos Group.
70 This material may be distributed subject to the terms and conditions set forth in
71 the Open Publication License, v
1.0,
8 June
1999.
72 <ulink url=
"http://opencontent.org/openpub/">http://opencontent.org/openpub/
</ulink>.