I need help for various topics of quantitative aptitude. Really in bad condition. please help.
At first start with the classical mechanics.The Hamiltonian mechanics and The Lagrangian mechanics. Wave theory by Schrodinger...For classical take Classical Mechanics by Goldstein...Once you depart from the classical mechanics this books will be helpful :-
Introduction to quantum mechanics by D.J.Griffiths
Quantum Mechanics by Landau- Lifshitz