SQL ATAN Function

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The SQL ATAN function returns an arc tangent of an input argument.

In math, the arctangent(x) is the inverse of tangent of x when x is a real number.

If

tan y = x

Then

arctanx= tan^-1 x = y

Syntax #

The following shows the syntax of the ATAN function.

ATAN(x)Copy

Argument #

The ATAN function accepts an argument x

Return #

The ATAN function returns the arc tangent of x, i.e.,  the value whose tangent is x.

Examples #

The following example shows how to use the ATAN function to calculate the arc tangent of 0.5:

SELECT ATAN(0.5);Copy

Output:

       atan
-------------------
 0.463647609000806
(1 row)Copy

Most database systems support the ATAN function.