Oracle9i SQL Reference
Release 1 (9.0.1)

Part Number A90125-01
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Functions, 10 of 166


ATAN2

Syntax

atan2::=


Text description of functions21a.gif follows
Text description of atan2

Purpose

ATAN2 returns the arc tangent of n and m. Inputs are in an unbounded range, and outputs are in the range of -pi to pi, depending on the signs of n and m, and are expressed in radians. ATAN2(n,m) is the same as ATAN2(n/m)

Example

The following example returns the arc tangent of .3 and .2:

SELECT ATAN2(.3, .2) "Arc_Tangent2" FROM DUAL;
 
Arc_Tangent2
------------
  .982793723

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