Returns the arc-cotangent of a number.

numberThe number you want the inverse cotangent of.

* Added in Excel 2013.
* The arc-cotangent of an angle is the inverse of the COT function.
* The angle returned is in radians between 0 and PI.
* If "number" is not numeric, then #VALUE is returned.
* You can use the DEGREES function to convert from radians to degrees.
* For a working example refer to the Trigonometry page.
* For the Microsoft documentation refer to

1=ACOT(0.5) = 1.11
2=ACOT(1) = 0.79
3=ACOT(COT(1)) = 1.00

1 - How many degrees is the arc-cotangent of 0.5 radians.

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