F64_ATanQuad()
Syntax
pointer.double
= F64_ATanQuad(x.double, y.double [,
result.double])
Description
Calculates
the Arcus Tangent of Y/X, i.e. the angle between the Line from 0|0 to X|Y and
the X Axis.
The result is stored in n1 or, if the optional parameter is given, in result.