ONE SHOT- INTRODUCTION TO TRIGNOMETRY CLASSS 10 MATH'S

Welcome to our one shot revision series for Trigonometry Class 10 Math's! In this video, we'll be covering the introduction to trigonometry, a crucial chapter in Class 10 Math's. Trigonometry is an essential concept in mathematics that deals with the relationships between the sides and angles of triangles. This one shot revision video is designed to help you grasp the basics of trigonometry and build a strong foundation for the subject. Our expert teacher will guide you through the concepts of trigonometry, covering topics such as trigonometric identities, angles, and triangles. Whether you're a student looking for a quick revision of the chapter or need help understanding the concepts, this video is perfect for you. Our one shot revision series is designed to help you learn and retain information quickly and efficiently. So, if you're ready to master trigonometry and ace your Class 10 Math's exams, then this video is a must-watch! 00:00:00 INTRODUCTION to TRIGOMETRY 00:09:12 Example 1 Given tan A = 4/ 3 , find the other trigonometric ratios of the angle A. 00:13:33 Example 2 If B and Q are acute angles such that sin B = sin Q, then prove that B = Q. 00:22:45 Example 4 : In a right triangle ABC, right-angled at B, if tan A = 1, then verify that 2 sin A cos A = 1. 00:26:22 Example 5 In triangle OPQ, right-angled at P, OP = 7 cm and OQ – PQ = 1 cm (see Fig. 8.12). Determine the values of sin Q and cos Q 00:30:13 Exercise 8.1 Question 1 In triagle ABC, right-angled at B, AB = 24 cm, BC = 7 cm. Determine : (i) sin A, cos A (ii) sin C, cos C 00:33:57 Exercise 8.1 Question 11 State whether the following are true or false. Justify your answer. (i) The value of tan A is always less than 1. (ii) sec A = 12/5 for some value of angle A. (iii) cos A is the abbreviation used for the cosecant of angle A. (iv) cot A is the product of cot and A. (v) sin θ= 4/ 3 for some angle θ 00:37:16 Trigonometric Ratios of Some Specific Angles 00:40:00 calculating Trigonometric Ratios of Some Specific Angles 01:00:08 Example 6 in ∠ ABC, right-angled at B, AB = 5 cm and ∠ACB = 30° (see Fig. 8.19). Determine the lengths of the sides BC and AC. 01:03:40 Example 7 In △ PQR, right-angled at Q (see Fig. 8.20), PQ = 3 cm and PR = 6 cm. Determine ∠ QPR and ∠ PRQ 01:07:28 Example 8 01:10:38 Exercise 8.2 Question 1 Evaluate the following : 01:21:40 Exercise 8.2 Question 2 Choose the correct option and justify your choice 01:23:45 Exercise 8.2 Question 3 If tan (A + B) = √3 and tan(A-B)=1/√3 A is greater than B, find A and B. 01:25:57 Exercise 8.2 Question 4 State whether the following are true or false. Justify your answer. 01:28:50 Trigonometric Identities 01:29:00 Proof of Trigonometric Identities 01:35:00 Example 9 Express the ratios cos A, tan A and sec A in terms of sin A. 01:38:15 Example 10 Prove that sec A (1 – sin A)(sec A + tan A) = 1. 01:40:23 Example 11 Prove that cot A– cos A cosec A–1 cot A + cos A cosec A +1 01:43:39 Example 12 01:52:06 Exercise 8.3 Question 1 Express the trigonometric ratios sin A, sec A and tan A in terms of cot A. 01:55:39 Exercise 8.3 Question 3 Choose the correct option. Justify your choice 02:02:46 Exercise 8.3 Question 4 part 1 02:04:52 Exercise 8.3 Question 4 part 2 02:07:25 Exercise 8.3 Question 4 part 3 02:16:30 Exercise 8.3 Question 4 part 4 02:19:10 Exercise 8.3 Question 4 part 5 02:24:41 Exercise 8.3 Question 4 part 6 02:26:45 Exercise 8.3 Question 4 part 7 02:30:07 Exercise 8.3 Question 4 part 8 02:33:05 Exercise 8.3 Question 4 part 9 02:35:54 Exercise 8.3 Question 4 part 10 02:39:30 Trigonometric ratios of complementary angles