Hey, 

The important chapters for Mathematics are: 

1. Matrices
2. Differential Equations
3. Integral Calculus
4. Trigonometric Functions
5. Continuity and Differentiability
6. Vectors and 3D Geometry
7. Three Dimensional Geometry

For co-ordinate geometry, draw graphs according to equations given and predict the answer.

For matrices, Do adjoint first or transpose/ square/ other operation first, the answer is the same. Try to use the options for finding the answer, rather than solving the entire sum.

If you find any particular question difficult, make sure that you don’t waste your time trying to solve it. Instead, you should move to the next question and if time permits come back to this question later.

Read every question very carefully before answering

Hope this helped you 

Thank you and keep asking :)