MySQL ATAN2() Function

Return the arc tangent of two values:

SELECT ATAN2(0.50, 1);

Definition and Usage

The ATAN2() function returns the arc tangent of two numbers.

ATAN2( a, b)

Parameter	Description
a, b	Required. Two numeric values to calculate the arc tangent of

Works in:	From MySQL 4.0

Return the arc tangent of two values:

SELECT ATAN2(-0.8, 2);