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.

Замечание: Для Windows-платформ эта функция не реализована.

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



acosh
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 Last updated: Tue, 15 Nov 2005