php man page for acosh

ACOSH(3)								 1								  ACOSH(3)

acosh - Inverse hyperbolic cosine

SYNOPSIS
       float acosh (float  $arg)

DESCRIPTION
	Returns the inverse hyperbolic cosine of $arg, i.e. the value whose hyperbolic cosine is $arg.

PARAMETERS
	      o $arg
		- The value to process

RETURN VALUES
	The inverse hyperbolic cosine of $arg

CHANGELOG
       +--------+--------------------------------------------------+
       |Version |						   |
       |	|						   |
       |	|		    Description 		   |
       |	|						   |
       +--------+--------------------------------------------------+
       | 5.3.0	|						   |
       |	|						   |
       |	|  This function is now available on all platforms |
       |	|						   |
       +--------+--------------------------------------------------+
SEE ALSO
       cosh(3), acos(3), asinh(3), atanh(3).

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