Chapter 2: DataWindow Expression Functions

ACos

Calculates the arccosine of an angle.

ACos ( n )

Argument	Description
n	The ratio of the lengths of two sides of a triangle for which you want a corresponding angle (in radians). The ratio must be a value between -1 and 1.

Double. Returns the arccosine of n if it succeeds.

This expression returns 0:

ACos(1)

This expression returns 3.141593 (rounded to six places):

ACos(-1)

This expression returns 1.000000 (rounded to six places):

ACos(.540302)