atanh
(PHP 4 >= 4.1.0, PHP 5)
atanh — Inverse hyperbolic tangent
Description
float atanh
( float $arg
)
Returns the inverse hyperbolic tangent of arg, i.e. the value whose hyperbolic tangent is arg.
Parameters
- arg
-
The argument to process
Return Values
Inverse hyperbolic tangent of arg
Changelog
| Version | Description |
|---|---|
| 5.3.0 | This function is now available on all platforms |