Hey,
First off,be thorough with the concepts of NCERT Mathematics of class 11th and 12th for JEE Mains and JEE Advanced. You can refer to any objective book for practice as, if your concept is strong you can solve any question. Cengage is a good book but you may refer to other books too.
You can refer to JEE Knockout Program of Careers360 for detailed help in your preparation by visiting the link given below:
https://learn.careers360.com/knockoutfull-jee-main-april/?icn=jee-knock-out&ici=jee-main_text-mapping
Hope this helps.
Good luck.

Hi,
As per my opinion and experience this book is ok for JEE mains preparation because it has variety of questions and students can practice every topic from this book it also host a very great number of examples, inside this book is also recommended for olympiads and JEE advanced.
Do I would suggest you to go for NCERT and RD Sharma also for JEE mains.

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