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ATAN function

ATAN is a trigonometric function that returns the arc tangent of a number. The return value is in radians and is between -PI and PI.

Syntax

ATAN(number)

Arguments

Return type

DOUBLE PRECISION

Examples

To return the arc tangent of 1 and multiply it by 4, use the following example.

SELECT ATAN(1) * 4 AS pi;
            
+-------------------+
|        pi         |
+-------------------+
| 3.141592653589793 |
+-------------------+

To convert the arc tangent of 1 to the equivalent number of degrees, use the following example.

SELECT (ATAN(1) * 180/(SELECT PI())) AS degrees;

+---------+
| degrees |
+---------+
|      45 |
+---------+