Differential Calculus. A subject that both challenges and defines the JEE preparation. For me, mastering this section was non-negotiable, and this book—Skills in Mathematics for JEE MAIN & ADVANCED: DIFFERENTIAL CALCULUS by Amit M. Agarwal (Arihant)—was the cornerstone of my strategy.
This wasn't just another textbook; it was a comprehensive guide that helped me build my skills from the ground up.
Why This Book Was My Essential Tool:
Sessionwise Theory: The structure, with its "Sessionwise Theory & Exercises," was a game-changer.