In this video, we cover Exercise 6.1 Class 9 Math New Book 2025 (PCTB Lahore) step by step with complete solutions and detailed explanations. This lecture is specially designed for 9th Class Math New Book 2025 Punjab Textbook Board students. We start with the basics of Trigonometry, Angles (Degree & Radian), Positive & Negative Angles, Co-Terminal Angles, Radian Definition, Arc Length, and Area of a Sector (Derivation). Then we move to all solved questions from Exercise 6.1 Class 9 Math according to the New Book 2025 PCTB. This lecture will help students prepare for exams and build strong concepts in Chapter 4 – Trigonometry of 9th Class Math. 👉 Watch full video with timestamps for easy navigation: ⏱ Timestamps: 0:00 – Intro 1:07 – Trigonometry 4:52 – Identifying Angle in Standard Position (Degree and Radian) 20:36 – Positive and Negative Angles 25:01 – Co-Terminal Angles 35:01 – Question 1(i) 37:32 – Question 1(ii) 38:45 – Question 1(iii) 40:54 – Question 1(iv) 42:10 – Question 1(v) 44:15 – Degree Measurement 58:43 – Question 2(i) 1:02:27 – Question 2(ii) 1:05:16 – Question 2(iii) 1:07:38 – Question 3(i) 1:11:08 – Question 3(ii) 1:12:39 – Question 3(iii) 1:13:55 – What is Radian 1:28:54 – Question 4(i) 1:30:32 – Question 4(ii) 1:34:35 – Question 4(iii) 1:39:39 – Question 5(i) 1:40:48 – Question 5(ii) 1:41:41 – Question 5(iii) 1:42:37 – Question 6 intro 1:43:16 – Arc Length and Area of Sector (Complete Derivation) 1:51:48 – Question 6(i) 1:54:47 – Question 6(ii) 1:58:15 – Question 7 2:06:16 – Question 8 2:11:25 – Question 9 ex 6.1 class 9 math, exercise 6.1 class 9 math, Ex 6.1 math class 9 new book, class 9 math ex 6.1 new book, 6.1 math class 9 new book, new book math class 9 punjab board 2025 ex 6.1, class 9 new book math exercise 6.1 complete, math class 9 chapter 4 new book 6.1, math new book class 9 ex 6.1, Exercise 6.1 class 9 math, ex 6.1 class 9 math new book, class 9 math new book ex 6.1, 9th class math new book 2025, class 9 trigonometry new book 2025, class 9 math radian definition, class 9 math arc length and area of sector 📚 More Learning Resources: 🔗 9th Physics Full Book: • Class 9th Physics New Book PCTB 🔗 9th Math Full Book: • Class 9th Math New Book PCTB 🌐 Website: https://albarreducation.com 📲 WhatsApp Channel: https://whatsapp.com/channel/0029VaEd... 💡 Patreon: https://patreon.com/sirsadam?utm_medi... #Class9Math #Exercise6_1 #MathNewBook2025 #PCTB #9thClassMath #Trigonometry #Radian #ArcLength #AreaOfSector #SIRSADAM