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.
Poznámka: T�to funkcia nie je
implementovan� na platform�ch Windows.
See also:
acos(),
asinh(), and
atanh().