sec4a-tan4a/ sec2a+tan 2a
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Step-by-step explanation:
superb Question. I think the strategy in solving this is to Involve :
1. Sin 4A = 2 Sin 2A. Cos 2A
2. 1 = sin Square 2A + Cos square 2A
you get = Tan 2A -Tan45 / 1 + Tan2A.Tan45
= Tan ( 2A-45)
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