This post will guide you how to use Excel ACOS function with syntax and examples in Microsoft excel.

Description

The Excel ACOS function returns the arccosine value of a number.

The ACOS function is a build-in function in Microsoft Excel and it is categorized as a Math and Trigonometry Function.

The ACOS function is available in Excel 2016, Excel 2013, Excel 2010, Excel 2007, Excel 2003, Excel XP, Excel 2000, Excel 2011 for Mac.

Syntax

The syntax of the ACOS function is as below:

= ACOS(number)

Where the ACOS function argument is:
Number – This is a required argument.  A number between -1 and 1 that you want the arccosine value.

Example

The below examples will show you how to use Excel ACOS function to return the arccosine value of a number.

#1 =ACOS(B1)

Note: the above formula will return the arccosine value of B1 cell.