array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'en', ), 'this' => array ( 0 => 'function.atanh.php', 1 => 'atanh', ), 'up' => array ( 0 => 'ref.math.php', 1 => 'Math Functions', ), 'prev' => array ( 0 => 'function.atan.php', 1 => 'atan', ), 'next' => array ( 0 => 'function.base-convert.php', 1 => 'base_convert', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'en', 'path' => 'reference/math/functions/atanh.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
atanh — Inverse hyperbolic tangent
Returns the inverse hyperbolic tangent of
num
, i.e. the value whose
hyperbolic tangent is num
.
num
The argument to process
Inverse hyperbolic tangent of num