The ACOS function returns the arccosine, or inverse cosine, of a number. The returned angle is given in radians in the range 0 (zero) to pi.
Formula:
=ACOS(number)
Explanations:
Number is required, the cosine of the angle you want and must be from -1 to 1.
Cautions:
– The result is the angle in radians, use 180/PI() or use the DEGREES function to convert into degrees.
