Class 10 Trigonometry Lecture 3 | Standard Angles Table + PYQs | CBSE 2027 | By Bhaiya

Welcome to Lecture 3 of the Class 10 Trigonometry series! In this lecture, we learn the values of trigonometric ratios for standard angles (0°, 30°, 45°, 60°, 90°) with an easy trick to remember the whole table. We then solve basic questions and Previous Year Questions (PYQs) step by step, so you’re ready for the CBSE Board Exam 2027. 📚 What you’ll learn in this lecture: 🔹 Values of sin 0°, sin 30°, sin 45°, sin 60°, sin 90° 🔹 Values of cos, tan, cosec, sec and cot for all standard angles 🔹 Easy trick to make the complete trigonometry table in under a minute 🔹 Why tan 90° and cot 0° are not defined 🔹 Basic questions using the table 🔹 Previous Year Questions (PYQs) from CBSE board exams 🔹 Step-by-step answer writing for full marks 📝 Types of PYQs solved in this lecture: ✔️ Evaluate: sin 60° cos 30° + sin 30° cos 60° ✔️ Evaluate: 2tan²45° + cos²30° − sin²60° ✔️ Evaluate: (5cos²60° + 4sec²30° − tan²45°) / (sin²30° + cos²30°) ✔️ If sin(A + B) = 1 and cos(A − B) = √3/2, find A and B ✔️ If tan(A + B) = √3 and tan(A − B) = 1/√3, find A and B ✔️ True/False and MCQ-based questions on standard angle values 💡 Important: This standard angles table is used in almost every trigonometry question, including Heights and Distances. Learn it well and you’ll save a lot of time in the exam. 👨‍🎓 Who should watch: CBSE Class 10 students preparing for Boards 2027 Students who forget the trigonometry table Anyone who wants to practise PYQs on standard angles 📌 Watch in order: ▶️ Lecture 1: Introduction to Trigonometry ▶️ Lecture 2: Question Practice Session ▶️ Lecture 3: Standard Angles Values + PYQs (this video) ⏱️ Timestamps: 00:27 – Introduction 1:37 – Values of cos, tan, cosec, sec, cot 14:20 – Basic questions 20:30– Previous Year Questions (PYQs) 🔔 Don’t forget to: 👍 Like the video if it helped you 💬 Comment your doubts. Bhaiya will answer them! 📤 Share with friends preparing for boards 🔔 Subscribe and turn on notifications for the next lecture Practice Makes Perfect. Practice → Solve → Score! 😊 #Class10Maths #Trigonometry #CBSE2027 #TrigonometryTable #StandardAngles #Class10Trigonometry #BoardExam2027 #MathsByBhaiya #PYQ #CBSEClass10 #TrigonometryTrick