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Mathematics 7 Online
OpenStudy (anonymous):

sin2xcosx+cos2xsinx=1/2

OpenStudy (loser66):

@xxaznben wolframalpha doesn't help you on tests, right? try to do it by hand, please. you have to prove it or solve for x?

OpenStudy (tpaulus):

Use you cosine and sine double angle identities!

OpenStudy (loser66):

@tpaulus ok, show him, please. few steps still help

OpenStudy (loser66):

warning: you don't know sin 2x or sin^2 x, have to confirm that first

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