Momentum Components in the XY Plane Based on Angle Phi
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![Xy plane.png](/./images/thumb/b/b4/Xy_plane.png/400px-Xy_plane.png)
Momentum Components in the XY Plane Based on Angle Phi
Checking on the sign from the cosine results for
We have the limiting range that must fall within:
![Xy plane.png](/./images/thumb/b/b4/Xy_plane.png/400px-Xy_plane.png)
Examining the signs of the components which make up the angle
in the 4 quadrants which make up the xy plane: