For input values between -1 and 1 inclusive, this function returns the angle in radians whose tangent value is the input. This function is the inverse of the tangent function. The value can be a Decimal or Integer literal or a reference to a column containing numeric values.

NOTE: While this function returns values outside of the range -1 <= x <= 1, those values are not considered valid.

For more information on the tangent function, see TAN Function.

arc cotangent:

Input rangeOutput computation

atan(1/x) + PI()

Numeric literal example:


Output: Returns the computation of the arc tangent of 0.5. Output value is in radians. 

Column reference example:


Output: Returns the arc tangent of the values in X column.


ArgumentRequired?Data TypeDescription
numeric_valueYstring, decimal, or integerName of column, Decimal or Integer literal, or function returning those types to apply to the function


Name of the column, Integer or Decimal literal, or function returning that data type to apply to the function.

Required?Data TypeExample Value
YesString (column reference) or Integer or Decimal literal0.5

Example - Trigonometry Arc functions