ACOS

The ACOS function returns the arccosine (inverse cosine) of a number in radians.

Syntax

=ACOS(number)

Parameters

• number: The cosine value to get the arccosine of. Must be between -1 and 1.

Examples

=ACOS(0) // Returns 1.5708 (π/2 radians or 90 degrees)
=ACOS(1) // Returns 0