9 Sec2 A - 9 tan2A
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Answer:
9 is the answer
Step-by-step explanation:
9sec²A-9tan²A
=(9/cos²A)-(9sin²A/cos²A) [ sec²A=1/cos²A]
[ tan²A=sin²A/cos²A]
=[ 9-9sin²A]/cos²A
=[9(1-sin²A)] / cos²A [sin²A +cos²A=1]
= [9 (cos²A)] /cos²A
= 9
I hope this will help you
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