(Sec^2A-tan^2A) is equal to
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Answer:
sin^2A + cos^2A = 1
Divide both the sides of the above equation by cos^2A =>
tan^2A +1 = sec^2A
[since sin^2A/cos^2A = tan^2A and 1/cos^2A = sec^2A]
So , sec^2A = tan^2A +1
=> sec^2A - tan^2A = 1
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