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Answers
Answered by
0
Answer:
the answer is a
Step-by-step explanation:
as we know sec^2a-tan^2 a =1 so
a (sec^2a-tan^2a)
a (1)
a
Answered by
1
Answer:
1a
Step-by-step explanation:
By trigonometric identify
sec^2-tan^2=1
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