**file1_3D_crossproduct.py**
![file1_3D_crossproduct](file1_3D_crossproduct.gif)
**file2_cylindrical_coordinates.py**
![file2_cylindrical_coordinates](file2_cylindrical_coordinates.gif)
**file2_spherical_coordinates.py**
![file2_spherical_coordinates](file2_spherical_coordinates.gif)