Returns the angle whose cosine is the specified number.

Syntax

Acos(number, [toRadians])

The ACOS function syntax has the following arguments:

  • number Required. The cosine of the angle you want and must be from -1 to 1.
  • isRadians Optional. Will convert it to Radians.

Example

Formula

Result

=Acos(0.5)

60.00000000000001

=Acos(0.5, "true") * (180 / 3.141592653589793)

60.00000000000001