ACOS

Returns an angle, in radians, whose cosine is the specified value.

Syntax

ACOS(Value)

Value is a number between -1 and 1 or a formula which returns a value between -1 and 1. If Value is outside of these bounds, the result is undefined.

Example

This example returns 1.5708 (pi/2 or 90 degrees):

ACOS(0)

This example returns 0:

ACOS(1)