Question

4. Choose the correct option. Justify your choice.
(i) 9 sec2A – 9 tan2A =
(A) 1                 (B) 9              (C) 8                (D) 0​

Answer 1

(i) (B) is correct.

Justification:

Take 9 outside, and it becomes

9 sec2A – 9 tan2A

= 9 (sec2A – tan2A)

= 9×1 = 9 (∵ sec2 A – tan2 A = 1)

Therefore, 9 sec2A – 9 tan2A = 9

Answer 2

Answer:

9

Step-by-step explanation:

Thank you so much

The answer is above