MySQL ATAN2() Function

In MySQL, the ATAN2() function returns the arc tangent of two specified numbers.

ATAN2() Syntax

Here is the syntax of MySQL ATAN2() function:

ATAN2(x, y)

Parameters

x, y

Required. Two numbers.

Return value

In MySQL, the ATAN2() function returns the arc tangent of two specified numbers.

If any parameter is NULL, the ATAN2() function will return NULL.

ATAN2() Examples

SELECT
    ATAN2(2.5, 1),
    ATAN2(0.75, 1),
    ATAN2(-0.9, 2),
    ATAN2(PI(), 2),
    ATAN2(NULL)\G

output

*************************** 1\. row ***************************
 ATAN2(2.5, 1): 1.1902899496825317
ATAN2(0.75, 1): 0.6435011087932844
ATAN2(-0.9, 2): -0.4228539261329407
ATAN2(PI(), 2): 1.0038848218538872
   ATAN2(NULL): NULL