Arctangent (inverse tangent) function. The result is the principal value of the nonzero complex number (X, Y) formed by the real arguments Y and X.
Elemental function
Same as X.
ATAN2 (1.5574077, 1.0) has the value 1.0.
Given that:
Y = | 1 1 | X = | -1 1 | | -1 -1 | | -1 1 |
the value of ATAN2(Y,X) is approximately:
ATAN2 (Y, X) = | 3PI/4 PI/4 | | -3PI/4 -PI/4 |