Question

what is the value of 9tan2A-9sec2A​

Answer 1

Answer:

9tan²a-9sec²a

9*1

9 is the value

Answer 2

Answer:

9

Step-by-step explanation:

Given,

9 sec² A - 9 tan²A

Using identity sec²A = 1 + tan²A.

= 9 (1 + tan²A) - 9 tan²A    

= 9 + 9 tan²A - 9 tan²A

Subtract both terms to obtain:

= 9