Tuesday, 14 May 2013

trigonometry - sin2xtan2x=sin2xtan2x trigonometric identity proof

I need to prove




sin2xtan2x=sin2xtan2x





I tried simplifying
sin2x=2sinxcosx;tan2x=2tanx1tan2x.



But it's so long and complicated that I feel I must've made a colossal mistake somewhere, or I am not using the correct equivalence. Or maybe I made a huge oversight from the beginning, and I don't need to simplify them in the first place.



Either way, i am stuck. Please help. Thanks.

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