The ACOT function in Excel calculates the arccot (inverse of cot) of a given number and returns the angle in radians between 0 and π. Arccot is inverse of cot.

ARCCOT(**b/a)= **θ

Arccot of the adjacent side – b, divided by the opposite side – a equal to the angle θ.

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**Syntax of ACOT Function in Excel**

ACOT(number)

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

**Example of ACOT Function in Excel**

**Formula**

- From Row number 2 to 5 ACOT is calculated in radians for value between -1 and 1 that is being passed as input to the ACOT Function.
- In row number 6, ACOT is calculated in degree for the value 1 which is 45 degree

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