There are no such important chapters for maths in NDA. In the maths portion the questions came from both 11th and 12th class. So, ypu have to cover all the topics that are included in the syllabus for NDA. But let me tell you that, you can choose some books, that will helps ypu a very lot in your preparation. Below, I have mentioned their names.
Mathematics by Cengage
RD Sharma Maths
I am also attaching a link here. You can check the whole syllabus of NDA here.
Hope it helps.
Below i will share with you a link which gives you the weightage for each topics in Maths and GAT.
As you can see from the link the chapters like Set theory, Relations and Functions, Trigonometry, Geometry, Quadratic Equations and Inequality are very much important.