Python to solve linear/nonlinear equations and euler angles
Numerical Routines: SciPy and NumPy
https://physics.nyu.edu/pine/pymanual/html/chap9/chap9_scipy.html
linear and nonlinear equations
https://izziswift.com/how-to-solve-a-pair-of-nonlinear-equations-using-python/
Euler
3D Rotations and Euler angles in Python
https://www.meccanismocomplesso.org/en/3d-rotations-and-euler-angles-in-python/
https://mino-git.github.io/rtcw-wet-blender-model-tools/publications/EulerToMatrix.pdf
https://rock-learning.github.io/pytransform3d/rotations.html
Program to find equation of a plane passing through 3 points
https://www.geeksforgeeks.org/program-to-find-equation-of-a-plane-passing-through-3-points/