Trigonometry: Lecture 2 by Pankaj Joshi Sir | Vibrant Academy | Nishant Jindal

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N Avasthi sir, MS Chouhan sir, VK Jaiswal sir, Pankaj Joshi sir (author of Black Book), Ninja sir, NKS sir have come online.
Glory of this team:

Produced AIR 1 in JEE 4 times.
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Produced AIR 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 in JEE Advanced.
Founders of Vibrant Academy, Kota. Each teacher with 25+ years of experience.
Authors of most important books for IIT JEE for decades.
Can you imagine learning from the teachers who even best of the best students don't get to learn from. Join the batch NOW!

Time stamps:

00:00 Intro & Welcome
01:34 Angle Measurements: Degree vs Radian
02:50 What is 1 Radian? (Concept & Definition)
07:27 Relation Between Radian & Degree
08:34 Arc Length Formula (L = Rθ)
13:53 Conversions: Degrees to Radians & Vice Versa
18:20 Question 1: Man Running Around a Square
24:52 Question 2: Man Running Around an Equilateral Triangle
30:10 Finding Values for Larger Angles (e.g., sin 210°)
33:08 Introduction to Compound Angles
35:18 Proof & Derivation: sin(A+B) & sin(A-B)
48:09 Proof & Derivation: cos(A+B) & cos(A-B)
52:31 Geometric Proof of Compound Angles Using a Rectangle
1:08:38 Values of sin(15°), cos(15°), sin(75°), & cos(75°)
1:13:33 Values of tan(15°) & tan(75°)
1:17:39 Basic Practice Questions Start
1:25:37 JEE Main PYQs Practice
1:38:40 Evaluating √3 cosec(20°) - sec(20°)
1:42:54 JEE Advanced 2024 PYQ
1:51:50 Homework Question & tan(A+B)
1:52:55 Outro & New Batch Details

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