asinh

(PHP 4 >= 4.1.0)

asinh -- Inverse hyperbolic sine

Description

float asinh ( float arg)

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

Poznßmka: Tato funkce nenφ implementovßna na platformßch Windows.

See also asin(), acos() and atan().