Question

evaluate 9 sec 2a -9tan2 a​

Answer 1

Answer:

By the help of the identity: sec2a-tan2a=1

9sec2a-9tan2a

take 9 common

9(sec2a-tan2a)

use the identity

9(1)

9

9 is the answer

Step-by-step explanation:

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Answer 2

Answer:

Step-by-step explanation:

Hello dude..

Below check ur answer.