In Math 151A you have to remember ridiculously many formulas and concepts, but the core is approximation. Miscellaneous ways of approximations. Newton's Methods, Numerical differentiation, Numerical Integration, Polynomial Interpolation, etc.

This man is a legend. He gives very clear lecture notes, and teaches the material in a systematic & integrated manner. You can rely on the notes though, but would recommend attending his live lectures (need to wake up early a little bit!!) His in-class notes are also organized.

Homeworks and tests are fair as long as you put efforts in this class. Try to take as many class as possible with him

Probably one of the best professors in the Math department along with Voss. If you just go to lectures, homework and tests will be a breeze.

If you don't wanna go to lectures, he posts all of his notes online for every lecture which is my personal favorite, so that even if you do go to class you can focus on the lecture not taking notes.