Documentation/How Tos/Calc: ACOS function
From Apache OpenOffice Wiki
ACOS
Returns the inverse cosine (the arccosine) of a number.
Syntax:
ACOS(number)
- returns the inverse trigonometric cosine of number, in other words the angle (in radians) whose cosine is number. The angle returned is between 0 and PI.
- To return the angle in degrees, use the DEGREES function.
Example:
ACOS(-1)
- returns 3.14159265358979 (PI radians).
DEGREES(ACOS(0.5))
- returns 60. The cosine of 60 degrees is 0.5.