Which r the best books for jee main and advance mathematics?

For JEE mains You cn refer NCERT books Concept wise.
& For JEE advance below books are very good.
1-Objective Mathematics By R.D. Sharma
2-Plane Trignomentry & Coordinate geomentry by S.L Loney
3-Problems in Calculus Of One Variable by I.A meron
4-Hall and Knight Higher Algebra
5-Integral Calculus for IIT JEE by arihant publication
6-Differencial Calculusfor IIT JEE by arihant publications
7-Mathematics by G.Tiwani (Pearson)

Hello Tejinder
You can the Mathematics series for JEE Mains and Advanced by Arihant that consists of Trigonometry and Algebra by S.K.Goyal, Play with graphs to understand graphs well.
If you want to solve higher level questions then you can go for Hall and Knight
But first of all, prepare NCERT thoroughly.
And you can also refer the previous year question papers for quick revision and practice.