Question: Currently I'm doing Advanced Classicial Mechanics courses.I'm finding it hard to understand due to the lack of knowledge in linear algebra, multi variable calculus and other chapters.

Can anyone suggest a mathematical book which is dedicated to teaching all the math that is used in physics?

Thank you,
Sai

Answer: 
Try [Mathematical Methods in the Physical Sciences](http://rads.stackoverflow.com/amzn/click/0471198269) by Mary Boas. It's pretty comprehensive and easy to follow.

Also, [Classical Mechanics](http://rads.stackoverflow.com/amzn/click/189138922X) by Taylor has a pretty decent section on inertia tensors (I'm *guessing* this is the linear algebra you need).
It might be a bit over your head now, but when you feel ready to take the next step, I have heard that [Advanced Mathematical Methods for Scientists and Engineers](http://books.google.se/books?id=-yQXwhE6iWMC&printsec=frontcover&dq=carl%20bender&hl=en&sa=X&ei=QT8JUr-yBqv74QSD5YCwBw&redir_esc=y#v=onepage&q=carl%20bender&f=false) by Carl Bender and Steve Orszag is a very nice book.

As a side note, his lecture series on Mathematical Physics is available on [Youtube](http://www.youtube.com/playlist?list=PLOFVFbzrQ49TNlDOxxCAjC7kbnorAR1MU).