What is the best way to prepare for JEE maths?
First of all, You need to make a proper schedule and follow it. It would be better if you talk with JEE toppers on call they can tell you how you can prepare for the exam. Many mentors are there to help students to get a very good scores. If it is possible to take a personal mentor for JEE preparation it will be very much helpful and you will get a good guidance for your exam.
Let’s start the discussion about which topics are the most important to crack the JEE exam.

Algebra : It is the easiest and most interesting topic where you can secure a good score easily in your examination. You need a good understanding of the concepts and practice is enough to score good marks. You need to prepare these topics in algebra :
• Differential Equations
• Quadratic Equations and Expressions
• Progressions and Series
• Probability
• Binomial Theorem
• Sets, Relations, and Functions
• Complex Numbers
• Permutation and Combination
• Matrices and Determinants 
Calculus : It is a very important topic in JEE examination. You have to prepare this topic in very depth it contains two sections: Differential Calculus and Integral Calculus, it associated with the fundamental theory of calculus. It will be applied to equation solving.

Coordinate Geometry: If you understand the concept then you can easily get full marks on this topic. As it is a huge topic some of the major sections. You can see in the previous year’s questions, that most of the questions are created from the topics of Straight lines and Circles.

Trigonometry: The most important chapter of maths in the JEE exam is Trigonometry. The most needed sections of trigonometry are trigonometric ratios and trigonometric functions. Try to write down the formulas in a notebook and then you can revise them frequently at any time it will be very much helpful.
A JEE topper can guide you that which topics you need to prepare carefully.
You can refer to these books:
• For basics, you can use NCERT books or any of your XI and XII maths books. This will give you an overview and will clear your basics at the beginning of your preparation.
• You can follow RD Sharma. It contains lots of examples and you will get various questions for your preparation. You can follow Cengage maths.
• Next, you can refer to ML Khanna. It contains a good amount of all types of questions.
• You can practice varieties questions from Arihant math books.
• Also not forget to solve previous year’s question papers to familiar with the question pattern.