Change sec4A-sec2A in terms of tanA.

is this question even correct? what do u think , anyways please can anyone try to answer it? Is 4 supposed to be there?

Thanks :)

sec4 A - sec2A = sec2A(sec2A-1) = (1 + tan2A)(1 +tan2A -1) = tan2A + tan4ALike plz

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