Excel Functions

Excel ACOS Function

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The ACOS function calculates the arccosine (i.e. the inverse cosine) of a given number, and returns an angle, in radians, between 0 and π.

Purpose of Excel ACOS Function

To get accrosine.

Return value

The arccosine, or inverse cosine, of a number..

Syntax

=ACOS(number)

Arguments

ArgumentsDescriptionRemarks
numberThe cosine of the angle you want and must be from -1 to 1.Mandatory

Usage notes

  • If you want to convert the result from radians to degrees, multiply it by 180/PI() or use the DEGREES function.

Availability

Since 2007 for Windows.
Since 2011 for Mac.

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