courses to become a Chartered Accountant

First of the all, basic maths is needed each and everywhere in life. And when coming to advanced maths like integration and all. They are mostly useful in CPT and somewhat in final. Being strong at maths is surely going to help you in costing and financial management as well as accounts.
Maths may not be as much needed when you pursue your CA course but once when you are done with CA and you want to join some field like investment banking, stock market, portfolio manager, financial analyst, etc., you will understand the dire importance of advanced maths. Many leave up maths in CPT thinking that the other subjects will set off it.
One thing I want to say to each and everyone pursuing CA, please do not study just to pass, do not mug up the concepts, understand them and practically apply them in life. You might fail once or twice in the exam (chances of which are also very less due to concepts being crystal clear), but you will never fail when you go out there in the cut-throat competitive world.
So, yes maths too is important, not that much but yes, it is.