Acos()

Working with Formulas > Functions Used in Formulas > Numeric Functions > Acos()

ACOS() returns the arc cosine of a number in units of radians. If the input is invalid, the function returns zero.

Function Format

ACOS(number) 

Return Value

ACOS() returns a numeric value 

Examples

ACOS(0) = 1.5708 

ACOS(COS(0)) = 0 

ACOS(COS(1)) = 1 

ACOS(COS(PI())) = 3.1416