Question

9 sec2 A-9 tan2 A choose the correct answer (a) 0, (b)3, (c) -9( d) 9​

Answer 1

Answer:

9

Step-by-step explanation:

9sec2A - 9tan2A

* sec2A _ tan2A =1 (identities)

9(sec2A _tan2A)

9(1)

=9