Hi

Your profile suggests that you are in class 12th so you are not eligible for CDS right now.

This is because,

Minimum qualification required for CDS is graduation.

You can check the same at

https://competition.careers360.com/articles/cds-eligibility-criteria

Anyway,

Best books for MATHS for CDS is given below:-

For top cds books checkout:- https://competition.careers360.com/articles/best-books-for-cds-exam

Coming to NDA

The top books which you can follow for the preparation of your NDA  examination  are provided below:-

>>>>>> MATHS for NDA

>>>>>> GAT

For more about books for nda visit :- https://competition.careers360.com/articles/best-books-prepare-for-nda

To help you further,

Here are the tips you should follow to prepare well for nda:-

--------------------------) First of all know the syllabus and examination pattern.

Syllabus:- https://competition.careers360.com/articles/nda-syllabus

Examination pattern:-

NDA Examination pattern  for Maths

NDA examination pattern for General Ability Test

------------------------) Practice questions:- after finishing each chapter you should practice mcqs in case of both Maths & GAT

------------------------) Short breaks :- take short breaks in between your studies, studying continuously can be brain tiring and it becomes difficult to focus and study with concentration, so take breaks to relax and refresh your brain.

------------------------) Make short notes:- You should make chapterwise short notes .These short notes will be a great revision tool for your examination.

------------------------) Set  goals :- set daily & weekly goals to cover your syllabus and meet them without any fail.

------------------------) Follow a routine or timetable :- you can make a routine and religiously follow it and try to give at least 7- 8 hours to study each day in your routine.

------------------------) Revise:- Revision is very important otherwise as you move forward in your syllabus, you start forgetting what  you have learned before and you won't be able to perform well in your examination.

------------------------) Solve previous year NDA question papers and attempt mock test :- Solving previous year and mock NDA questions papers will let you know the examination pattern, your preparation level etc and  it will be of great help to you . For nda previous year papers checkout our page at:- at https://competition.careers360.com/articles/nda-question-papers/amp

For more tips checkout:- https://competition.careers360.com/articles/how-to-prepare-for-nda

Thank you