Acos()

Computes the arccosine of a value.

rslt = Acos(real value)

Argument	Contents
value	Any number between -1.0 and +1.0

A real number equal to the angle in radians whose cosine is value.

Function	Summary
Cos()	Computes the cosine of an angle expressed in radians
Asin()	Computes the arcsine of a value
Atan()	Computes the arctangent of a value