Question

18. 9 sec^2 A - 9 tan^2 A =​

Answer 1

Answer:

9 sec²A-9tan²A

=9(sec²-tan²)

=9(answer)

[ as value of sec²A-tan²A=0]

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

9 sec²A-9tan²A

9 (1+tan²A)-9tan²A

9+9tan²A-9tan²A

9+0

9 ..

Ans..

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