Class X(CBSE)| Maths | NCERT Textbook Solution | Exercise 8.2 (2 [i, ii, iii, iv], 3, 4) (in Hindi)

Lesson 6 of 6 • 1 upvotes • 10:27mins

Brijesh Sharma

These videos are the solution of CBSE NCERT book of class X. In this lesson, 4 sub questions of Q2 and Q3, along with Q4 are solved of Exercise 8.2 Here are the questions, 2) Choose the correct option and justify your choice: i) (A) sin 60° (B) cos 60° (C) tan 60° (D) sin 30° ii) (A) tan 90° (B) 1 (C) sin 45° (D) 0 iii) sin 2A = 2 sin A is true when A = (A) 0° (B) 30° (C) 45° (D) 60° iv) (A) cos 60° (B) sin 60° (C) tan 60° (D) sin 30° 3) If tan (A + B) = Root 3 and tan (A – B) = 1 upon root 3; 0° < A + B ≤ 90°; A > B, find A and B. 4. State whether the following are true or false. Justify your answer. (i) sin (A + B) = sin A + sin B. (ii) The value of sin q increases as q increases. (iii) The value of cos q increases as q increases. (iv) sin q = cos q for all values of q. (v) cot A is not defined for A = 0°.