06/05/2026
π Vector Trick in 15 Seconds β‘ | CBSE 2025 π₯ JEE Aspirants MUST WATCH π±
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Preparing for CBSE Class 12 Maths 2025 or JEE Main/Advanced? π―
This reel covers a super important vector concept frequently asked in exams.
π‘ Given:
a + b + c = 0
|a| = β37, |b| = 3, |c| = 4
π₯ Shortcut Trick:
π b + c = -a
π |b + c|Β² = |a|Β²
π 3Β² + 4Β² + 2(bΒ·c) = 37
π bΒ·c = 6
Now apply:
π |b||c|cosΞΈ = 6
π 3 Γ 4 Γ cosΞΈ = 6
π cosΞΈ = 1/2
π ΞΈ = Ο/3 β
β‘ Why you should learn this:
βοΈ Saves time in MCQs
βοΈ High probability exam question
βοΈ Boosts confidence instantly
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