Oracle Built In Functions:ATAN function
In Oracle PL/SQL ATAN Function Returns the arc tangent of n. Inputs are in an unbounded range, and outputs are in the range of -pi/2 to pi/2 and are expressed in radians.
Syntax
ATAN(n)
Example
SELECT ATAN(.3) “Arc-Tangent” FROM DUAL;
Arc-Tangent
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