Name
atan2 — return the two-argument arc tangent, in radians
Synopsis
atan2(
|
in x double precision, |
in y double precision); |
Description
atan2 returns the arc tangent of the two-dimensional
Cartesian point given by x and
y. Unlike atan, it uses the
signs of both arguments to choose a result in any quadrant. The result is
an angle in radians. The arguments are converted to IEEE 64-bit floats and
the result is of that type.
Parameters
x
X coordinate, as double precision.
y
Y coordinate, as double precision.
Return Types
atan2 returns a double precision angle
in radians.
Examples
Example 24.521. Simple example
SQL> select atan2(1, 1);
unnamed
DOUBLE PRECISION NOT NULL
_______________________________________________________________________________
0.7853981633974483
1 Rows. -- 0 msec.