@ACos (Formula Language)
Calculates the arc (inverse) cosine, using the cosine of an angle.
Syntax
@ACos( cosine )
Parameters
cosine
Number or number list. A cosine of an angle, from -1 through 1.
Return value
angle
Number or number list. An angle, in radians, from 0 through pi. This represents an angle between 0 and 180 degrees.
Usage
If the parameter is a list, the function operates on each element of the list, and the return value is a list with the same number of elements.
Examples
- This example returns pi/2.
@ACos( 0 ) - This example returns 1.0472 radians (60 degrees).
@ACos( 0.5 ) - This example returns 1.0472 radians and pi/2 in a list.
@ACos( 0 : 0.5 )