Hello,

Few of the many important chapters and must read parts are:

(a) Applications of Derivative

(b) Limit and Continuity

(c) Matrices and Determinants

(d) Straight Lines and Pair of Straight Lines

However, this is just a view not the only topic that are imporatant

Go throughthis link for more information on Important topics in maths: https://engineering.careers360.com/articles/best-books-for-jee-main-2019

For complete JEE Mains Syllabus: https://engineering.careers360.com/articles/jee-main-syllabus

For official JEE Mains Syllabus: https://jeemain.nic.in/WebInfo/Handler/FileHandler.ashx?i=File&ii=33&iii=Y

Please Note: JEE Main 2019 for April session will be conducted on April 7 (Paper 2) and April 8, 9, 10 and 12 (Paper 1). 

• 3D GEOMETRY
• CONIC SECTIONS
• CALCULUS
• FUNCTIONS
• TRIGONOMETRY
• PROBABILITY
• P&C
• SEQUENCE AND SERIES