MySQL ATAN() Function

Return the arc tangent of a number:

SELECT ATAN(2.5);

Definition and Usage

The ATAN() function returns the arc tangent of one or two numbers.

ATAN( number)

OR:

ATAN( a, b)

Parameter	Description
number	A numeric value
a, b	Two numeric values to calculate the arc tangent of

Works in:	From MySQL 4.0

Return the arc tangent of two values:

SELECT ATAN(-0.8, 2);