Calculating ATAN2

[Thomas Klemm]

(12-02-2022 08:41 PM)Matt Agajanian Wrote:  So, what would be the formula for ARG on the W516X?

I'm not familiar with that calculator but with Python you could use the following:

Code:

from math import pi, sqrt, atan

def arg(x, y):
    r = sqrt(x**2 + y**2)
    return pi if r + x == 0 else 2 * atan(y / (r + x))

It is based on the tangent half-angle formula:

\(
\begin{align}
\tan \tfrac{1}{2}\theta = \frac{\sin \theta}{1+\cos \theta}
\end{align}
\)