12th Mathematics Chapter Study Material English Medium 2021 By S Rajan M Sc M Phil M Ed May 2026

The difference was immediate. Where his school textbook used dense paragraphs, Rajan sir used a single, hand-drawn flowchart. For every definition—Reflexive, Symmetric, Transitive—there was a tiny, real-life example. “Reflexive? You are related to yourself. Symmetric? If Arjun is Shreya’s friend, then Shreya is Arjun’s friend (hopefully!). Transitive? If Arjun is taller than Rohan, and Rohan is taller than Priya, then…”

It wasn't flashy. It had no “50 Sample Papers” or “Crash Course” stickers. Arjan almost put it back, but the price was just thirty rupees. He shrugged and bought it, more out of pity for the old bookseller than hope. The difference was immediate

Arjun turned to Chapter 1: Relations and Functions . “Reflexive

Arjun followed the instructions like a mantra. If Arjun is Shreya’s friend, then Shreya is

The night before the exam, Arjun didn't cram. He re-read the final page of S. Rajan’s material. It wasn't a revision formula. It was another letter.

— S. Rajan

That night, he opened it.