## ACOS function: Description, Usage, Syntax, Examples and Explanation

What is ACOS function in Excel? ACOS function is one of the Math and Trig functions in Microsoft Excel that 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 of ACOS function ACOS(number) …