Hii aspirants 

Here are list of few important chapter in mathematics for nda exam. These are

• Probability(with P&C) and Statistics.
• Matrices and Determinants.
• Sets(Venn diagrams)
• Relations and Functions.
• Trigonometry.
• Differentiation
• Integration
• Straight Lines and Conic Sections.
• Complex numbers.
• Vectors and 3D Geometry.
• Pemutation and combination
• Co ordinate geometry
• I hope My answer will help you out
• Good luck