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mebsBest ResponseYou've already chosen the best response.1
sin(4x) = sin( 2x + 2x) Recall that sin( A +B) = sin(A)cos(B) + cos(A)sin(B) so it is = sin2xcos2x + sin2xcos2x
 8 months ago

mebsBest ResponseYou've already chosen the best response.1
can you figure out the rest?
 8 months ago

nikkinicholaouBest ResponseYou've already chosen the best response.0
What else do i do?
 8 months ago

mebsBest ResponseYou've already chosen the best response.1
what else is there to do other than add it ?
 8 months ago

nikkinicholaouBest ResponseYou've already chosen the best response.0
I dont know!! haha
 8 months ago

mebsBest ResponseYou've already chosen the best response.1
haha well did I verify it ..now your done!
 8 months ago

nikkinicholaouBest ResponseYou've already chosen the best response.0
thank you so extremely much. :)
 8 months ago

cambrigeBest ResponseYou've already chosen the best response.1
U can use the identity sin2y=2sinycosy!! and take sin4x=sin2(2x) where take 2x as y and prove it!!
 8 months ago
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