Calculus 2(Integrals and shit)

If any of you have taken this course and gotten As or Bs, How much time did you study per week?
The profesor is telling us to study at least 2 hours for every hour we spend in class, should I?

integrals are easy at first, but can get complicated once you put some sin/cos in them; there are a few problems that need some simple tricks in order to solve them. at the end of the course you might do some series, that might be hard for a beginner because its kinda going into cal3 and the summation symbol can be scary at first.