WorksheetFunction.Acos Method (Excel)

Returns the arccosine, or inverse cosine, of a number. The arccosine is the angle whose cosine is Arg1. The returned angle is given in radians in the range 0 (zero) to pi.


expression. Acos( _Arg1_ )

expression A variable that represents a WorksheetFunction object.


Name Required/Optional Data type Description
Arg1 Required Double The cosine of the angle you want and must be from -1 to 1.

Return value



If you want to convert the result from radians to degrees, multiply it by 180/PI() or use the Degrees method.

See also

WorksheetFunction Object