Class 10 Maths - Theorem 1.3 Proof | Most Important Board Exam Question | SineCos

Описание: #Class10Maths #Theorem1.3 #cbse2026
In this video, we break down Theorem 1.3 from Class 10 Maths Chapter 1, the fundamental pillar of the Real Numbers unit. This theorem is often the "hidden key" students miss, yet it is essential for proving the irrationality of numbers like $\sqrt{2}$ and $\sqrt{5}$—which are guaranteed questions in the CBSE Board Exams. We explain the core logic—if a prime number $p$ divides $a^2$, it must also divide $a$—using simple examples and a step-by-step proof. This SineCos guide is designed to help you master the concept quickly so you can secure those vital marks with absolute confidence. We focus on the most expected exam patterns to ensure your preparation is sharp and effective for 2026. Don't let this small but powerful theorem confuse you; watch the full tutorial to see how it simplifies your entire Chapter 1 revision. Perfect for building a strong foundation, this is the only Theorem 1.3 explanation you’ll ever need to ace your finals!Why Master Theorem 1.3?The Foundation: You cannot solve "Prove $\sqrt{2}$ is irrational" without this logic.Board Favorite: Regularly featured in 2-mark and 3-mark question sets.SineCos Method: Simplified prime factorization logic that anyone can follow.Subscribe to SineCos and hit the bell icon to join our mission of making Class 10 Maths the easiest subject in your marksheet!
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B.Tech – IIT Delhi graduate | 18+ years of IIT-JEE teaching experience
Senior Mathematics Faculty at Bansal Classes Kota, Etoos, and Vibrant Academy
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