MySQL ATAN() Function

In MySQL, the ATAN() function returns the arc tangent of the specified number.

`ATAN()` Syntax

Here is the syntax of MySQL ATAN() function:

ATAN(number)
ATAN(x, y)

Parameters

number: Required. The value whose arc tangent is to be returned.
x, y: Required. The two values.

Return value

In MySQL, the ATAN() function returns the arc tangent of the specified number.

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

`ATAN()` Examples

SELECT
    ATAN(2.5),
    ATAN(0.2),
    ATAN(-0.5),
    ATAN(-0.2),
    ATAN(-0.9, 2),
    ATAN(PI(), 2),
    ATAN(NULL)\G

output

*************************** 1\. row ***************************
    ATAN(2.5): 1.1902899496825317
    ATAN(0.2): 0.19739555984988078
   ATAN(-0.5): -0.4636476090008061
   ATAN(-0.2): -0.19739555984988078
ATAN(-0.9, 2): -0.4228539261329407
ATAN(PI(), 2): 1.0038848218538872
   ATAN(NULL): NULL

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