php man page for sinh

SINH(3) 								 1								   SINH(3)

sinh - Hyperbolic sine

SYNOPSIS
       float sinh (float  $arg)

DESCRIPTION
	Returns the hyperbolic sine of $arg, defined as (exp(arg) - exp(-arg))/2.

PARAMETERS
	      o $arg
		- The argument to process

RETURN VALUES
	The hyperbolic sine of $arg

SEE ALSO
       sin(3), asinh(3), cosh(3), tanh(3).

PHP Documentation Group 														   SINH(3)