Hi Rahul,

JEE main 2020 syllabus is as follows:- complex numbers and quadratic equations ,trigonometric functions ,Matrix and determinants, conic section co-ordinate geometry , vectors, 3D dimensional geometry etc.

For physics kinematics , rotational motion, circular motion, thermodynamics, gravitation, simple harmonic motion, oscillation, optics , current and electricity etc. .

For chemistry some basic concepts of chemistry chemical kinetics hello alkane and haloarene atomic theories,  chemical bonding and molecular structure etc..

For knowing more information about JEE mains syllabus you can go through the link given below.

Link:- https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-syllabus/amp

I hope you get your answer.

All the best for your future!