Returns the arc-cotangent of a number.

numberThe number you want the inverse cotangent of.

* For an illustrated example refer to the [[Trigonometric Functions]] page.
* The inverse of this function is 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 ACOS function to return the arc-cosine.
* You can use the ASIN function to return the arc-sine.
* You can use the ATAN function to return the arc-tangent.
* You can use the COT function to return the cotangent.
* You can use the DEGREES function to convert from radians to degrees.
* This function was added in Excel 2013.
* For the Microsoft documentation refer to
* For the Google 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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