ATAN¶

Computes the inverse tangent (arc tangent) of its argument; the result is a number in the interval [-pi, pi].

Syntax¶

ATAN( <input_expr> )

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input_expr: The value or expression to operate on. The data type must be FLOAT.

This function returns a value of type FLOAT.

Returns the arc tangent in radians (not degrees) in the range [-pi, pi].

SELECT ATAN(1);

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+--------------+
|      ATAN(1) |
|--------------|
| 0.7853981634 |
+--------------+