PHP Manual: asinh


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asinh

(PHP 4 >= 4.1.0, PHP 5)

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.

Note: This function is not implemented on Windows platforms.

Parameters

arg

The argument to process

Return Values

The inverse hyperbolic sine of arg