Coth

COTH

Type Function	REAL
Input X	REAL (input)
Output	REAL (output value)
COTH calculates the hyperbolic cotangent by the following formula
	For input values larger than 20 or less than -20 COTH provides the approximate value +1 or -1 corresponding to an accuracy better than 8 digits and is thus below the resolution of type REAL.