ACOS

Applies to: Calculated column Calculated table Measure Visual calculation

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

Syntax

ACOS(number)  

Parameters

Term	Definition
Number	The cosine of the angle you want and must be from -1 to 1.

Return value

Returns the arccosine, or inverse cosine, of a number.

Remarks

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

Example

Formula	Description	Result
= ACOS(-0.5)	Arccosine of -0.5 in radians, 2*pi/3.	2.094395102
= ACOS(-0.5)*180/PI()	Arccosine of -0.5 in degrees.	120