atanh

(PHP 4 >= 4.0.7, 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

See Also

• tanh()
• atan()
• asinh()
• acosh()