GET ARCCOSINE Value using ACOS Function in Excel

The ACOS function in Excel calculates the arccosine (inverse of cosine) of a given number and returns the angle in radians between 0 and π. Arccosine is inverse of cosine.

Trigonometric Function in ExcelARCCOS(b/c)= θ

Arccosine of the adjacent side – b, divided by the hypotenuse – c equal to the angle θ.

 

Syntax of ACOS Function in Excel

ACOS(number)

Where Argument number is a value between -1 and 1 which you need to calculate the arccosine.

Example of ACOS Function in Excel

Formula

ACOS Function in Excel 1

  • From Row number 2 to 5 ACOS is calculated in radians for value between -1 and 1 that is being passed as input to the ACOS Function.
  • In row number 6, ACOS is calculated in degree for the value 0 which is 90 degree

Note: if you want the value of ACOS Function to be calculated in degrees, then convert it in degrees using DEGREES Function as shown in 6th row.

Result

ACOS Function in Excel 2

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