at first you have to clear your query. Then i should answerd this.

Hey.

Here is a list of important topics for Mathematics for WBJEE 2019.

Algebra

A.P., G.P., H.P.

Complex Numbers

Quadratic Equations

Logarithms

Permutation and combination

Matrices

Sets, Relations and Mappings

Principle of mathematical induction

Statistics and Probability

Trigonometry

Application of Calculus

Calculus

Differential calculus

Coordinate geometry  of three dimensions

Second order derivative

Integral calculus

Vectors