Hi Shraddha!

As you are attempting NATA for choosing your career path, you must be aware of the syllabus concerned for a particular subject. Likewise, for mathematics, you would be asked questions related to the textbook prescribed by the exam authorities. Mostly, NCERT books are preferred as the main course book for studying mathematics for NATA. NCERT books are designed in such a way that it encompasses all set of questions which would give you a gist of the topic and could be worked out for more understanding of the topic.

Concerning about the syllabus for mathematics, you would be asked questions from following chapters/topics:

Algebra

Logarithms

Matrices

Trigonometry

Coordinate geometry

3-Dimensional Co-ordinate geometry

Theory of Calculus

Application of Calculus

Permutation and Combination

Statistics and Probability

According to your query, it is agreed that for NATA exam, maths syllabus is included from book. Referring to book prescribed in general would give you insight about the question to be asked in exam. I hope that your doubt is solved. Please update if you still face problems about the same. 

You could refer to this link for syllabus: https://engineering.careers360.com/articles/nata-syllabus

Happy studying!