Hi,

Pathfinder will be enough. Nda pathfinder is best for nda, specially for mathematics. It will provide you the previous year question with other questions for practise. Its also provide solutions of all questions. Moreover, it’s just about basic maths till class 12 which you should do. In NDA exam, what matters in mathematics is how many questions you attempted because it’s a race against the time. The more questions you will attempt( obviously accuracy matters), the more chances you will have in clearing this exam.

Yes the book is good but right now the level of NDA paper is increasing day by day so practice JEE level questions for maths preparation .

Hope this helps.

Good luck.