Class 10 Maths Exercise 8.3 (Example 9) | Express cosA, tanA, secA in terms of sinA

In this video, we solve NCERT Class 10 Maths – Chapter 8: Introduction to Trigonometry, Exercise 8.3 (Example 9). 👉 Question: Express the ratios cos A, tan A and sec A in terms of sin A. This example is very important for understanding basic trigonometric identities and is frequently used in CBSE Class 10 Board Exams. 📘 What you will learn in this video: ✔ How to express one trigonometric ratio in terms of another ✔ Use of the identity 〖sin⁡〗^2 A+〖cos⁡〗^2 A=1 ✔ Step-by-step NCERT solution ✔ Concept clarity for Trigonometric Identities ✔ Board-exam–friendly method 🎯 Useful for: CBSE Class 10 Board Exam 2026 NCERT Maths Chapter 8 Exercise 8.3 practice Trigonometry basics & identities Exam revision and concept building 👍 Watch till the end for complete understanding and better exam performance.