Class 10th Trigonometry Exercise 8.3 (Q1,Q2,Q3) New NCERT CBSE Pattern | Ex 8.3 Q1

Class 10th Trigonometry Exercise 8.3 (Q1,Q2,Q3) New NCERT CBSE Pattern | Ex 8.3 Q1

Introduction to Trigonometry Exercise 8.3 new ncert class10 ex 8.3

Here we have solved class 10th Trigonometry exercise 8.3 Question 1, Question 2 and Question 3 in an easy way based on cbse new exam pattern

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00:00 Introduction
00:08 Class 10th ex 8.3 Q.1 Express the trigonometric ratios sin A, sec A and tan A in terms of cot A.
03:32 Class 10 Ex 8.3 Q.2. Write all the other trigonometric ratios of  A in terms of sec A.
07:58 Class 10 ex 8.3 Q.3. Choose the correct option. Justify your choice.
(i) 9 sec² A – 9 tan² A =
(A) 1 (B) 9 (C) 8 (D) 0
(ii) (1 + tan  + sec ) (1 + cot  – cosec ) =
(A) 0 (B) 1 (C) 2 (D) –1
(iii) (sec A + tan A) (1 – sin A) =
(A) sec A (B) sin A (C) cosec A (D) cos A
(iv)
2
2
1 tan A
1 + cot A
 
(A) sec2
A (B) –1 (C) cot2
A (D) tan2
A

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