Question

Evaluate 9 sec2A – 9 tan2 A​

Answer 1

Answer:

9

Step-by-step explanation:

We have,  9sec2A−9tan2A

Let  r=9sec2A−9tan2A

r=9(sec2A−tan2A)

We know that

sec2A−tan2A=1

Therefore,

r=9×1=9

Hence, this is the answer.

hope it will help you

MAKE ME AS BRAINLIST

Answer 2

Answer:

Hence, this is the answer

Step-by-step explanation:

We have,  9sec2 A−9tan2 A

Let  r=9sec 2 A−9tan 2 A

r=9(sec2 A−tan2 A)

We know that  sec  2 A−tan 2 A=1

Therefore,

r=9×1=9