Trigonometry L-5 | Quadrant Rule & Reduction Formulae (Allied Angles)| Class11 | JEE Main & Advanced

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📚 In this video:
In this video, we cover one of the MOST IMPORTANT and confusing topics of Trigonometry —
Quadrant Rule & Reduction Formulae of Allied Angles, which is fundamental of Trigonometry & used through out the maths.

This is Lecture 5 of Trigonometry, where you’ll learn how to decide sign + function correctly without memorising blindly.

📌 What you’ll learn in this lecture:
✔ What is Quadrant Rule (ASTC rule)
✔ Sign of trigonometric functions in different quadrants
✔ Reduction formulae of allied angles (90°, 180°, 270°, 360°)
✔ Step-by-step approach for JEE-type problems
✔ Common mistakes students make ❌

🎯 Essential for Class 11, Class 12, JEE Mains & Advanced & CUET aspirants.

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⏰ Timestamps :
00:00:00 INTRO
00:00:35 QUADRANT RULE (ASTC RULE)
00:21:36 REDUCTION FORMULAE
00:33:27 SHORT-CUT FOR REDUCTION FORMULAE

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✔️ Class 11 & 12 Maths for CBSE Boards + NCERT
✔️ CUET & BITSAT Maths preparation
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