Question

prove that sec4x-1/sec2x-1=tan4x/tanxx.

Answer 1

Answer:

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Step-by-step explanation:

LHS = sec 4 x - 1 sec 2 x - 1 = ( 1 - cos 4 x ) cos 2 x ( 1 - cos 2 x ) cos 4 x = 2 sin 2 2 x . sin 2 x equating LHS = RHS , we have 2 sin 2 2 x . ... cos 2 x 2 sin 2 x .