More physics and mathematics. I am currently on Lagrangian mechanics and calculus of variations. Am also learning Jupyter and SymPy for visualizarions of the same.
During my high school, only Newtonian mechanics was taught, whereas in engineering college, they introduced quantum mechanics with Lagrangian/Hamiltonian formulation, skipping classical mechanics with those two.
Self-learning via books. I've bought a bunch. Am currently going through Susskind's Theoretical Minimum Classical Mechanics [1], also looking through No Nonsense Classical Mechanics [2].
AI chatbots sometimes come to rescue when I am stuck. Not with mathematics though.
During my high school, only Newtonian mechanics was taught, whereas in engineering college, they introduced quantum mechanics with Lagrangian/Hamiltonian formulation, skipping classical mechanics with those two.
The purpose of learning is just fun.