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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.

Bemærk: Denne funktion er ikke implementeret på Windows platformen.

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

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