acosh

(PHP 4 >= 4.1.0, PHP 5)

acosh -- Inverse hyperbolic cosine

Description

float acosh ( float arg )

Returns the inverse hyperbolic cosine of arg, i.e. the value whose hyperbolic cosine is arg.

Huomaa: T�t� funktiota ei ole viel� implementoitu Windows-alustalle.

See also: acos(), asinh(), and atanh().