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About 10 years ago I took calculus 1 and 2. I know a few basics. Like integrals are good for areas of curves. And derivatives are good for finding relative slopes. I have decent grasp of simple derivation/integration like the power rule. However I get really confused with more complex stuff like the quotient rule. I passed calculus with an A and I dunno how. Now I'm looking for something that'll me grasp calc better for up coming classes 10 years later. (I dont have my old school book). I'm currently pursuing a chemistry/engineering major. What would be a good self study textbook for 1-variable calculus with a pinch of multivariable?

Kelvin Lois
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Charles Garzon
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    Welcome to MSE. Please include your question in the body of the question, instead of putting it only in the title. – José Carlos Santos Jul 30 '20 at 09:36
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    May I know what is your purpose for studying this again ? – Kelvin Lois Jul 30 '20 at 09:42
  • Jose, I did as you asked. – Charles Garzon Jul 30 '20 at 09:58
  • @SiKucing I'm using it as a reference book and something to help me prepare for physics and other possible sciences. I am an engineering/chemistry major. – Charles Garzon Jul 30 '20 at 10:00
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    If you don't want to be rigorous, a good standard calculus book that also emphasizes on application is Steward's Calculus: Early Transcendentals. Spivak's and Apostol's aim for serious audience such as math majors. See https://math.stackexchange.com/questions/472838/what-is-the-best-book-for-calculus for further suggestion. Maybe will help. – Kelvin Lois Jul 30 '20 at 10:13

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My personal recommendation is Thomas' Calculus, 14th Edition. It covers all of single-variable calculus with sufficient depth(not as rigorous as Spivak's Calculus, but reasonable for your purposes), and also dives into multivariable calculus upto Green's Theorem. As an alternative to textbook, Khan Academy's Calculus course is pretty neat for brushing up.

Manan
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    Since you mentioned in the comments that you need a Calculus textbook for applications in sciences, Thomas' Calculus certainly has the upper edge because the problem sets contain a variety of questions catering to those in sciences and engineering. – Manan Jul 30 '20 at 10:07