This seems like a silly question, but time is a huge factor for me.
I will be taking a Calculus 2 class for my next semester, and having just finished up Calc 1 (ending on integrals), I want to supplement my studies outside of class so that I am prepared.
I have seen two authors, Apostol and Spivak, mentioned as the go-to for studying calculus.
During the semester I will not have an abundant amount of time to do this sort of on-the-side studying, so I am wondering what the best option would be to make sure I can handle Calculus 2:
Apostol, Spivak, Khan Academy, or something completely different?
Topics covered in my calc 2 course: Techniques of integration, arc length, solids of revolution, applications, polar coordinates, parametric equations, infinite sequences and series, power series.
(Computer science major, interested in all things math)
First you should really try to use the recommended textbook and follow your professor's lectures. That being said, it never hurts to have a backup plan but we really need to know more information before suggesting alternatives. Is this course the standard undergrad Calc. II, or Calculus for math majors? Sure Spivak and Apostol come highly recommended... by mathematicians. But honestly if you are just trying to get a prereq. out of the way, I would go another route such as the standard text by Stewart. Khan Academy may help but most of my students who use Khan are lost causes. That is, they don't come to class or do the homework exercises, then they try Khan at the last minute to avoid failing. Your professor should be your best resource.