Hello student.

See actually there are huge difference between West Bengal joint mathematics and JEE mains mathematics. The difficulty level of JEE MAIN mathematics is more than than WBjee. If you are only preparing for or West Bengal joint, then my advice is that if you from Bengal Board you should go for general Syllabus book, practise previous year question papers and do lots of mocktests.

But if you are preparing for both JEE main and WB jee then you should go through NCERT for all basic mathematics and formula, but you always should practice good books like RD Sharma to have a better idea about all types of questions. Click on the link below to know more more about the best books for JEE main

https://engineering.careers360.com/articles/best-books-for-jee-main

If you are preparing for JEE main you can go for JEE knockout course which can help you a lot with various types of mock test live doubt solving weekend class specialised reports ETC

Click on the link below to know

https://learn.careers360.com/engineering/jee-main-preparation-material/