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mebs Group TitleBest 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
 one year ago

mebs Group TitleBest ResponseYou've already chosen the best response.1
can you figure out the rest?
 one year ago

nikkinicholaou Group TitleBest ResponseYou've already chosen the best response.0
What else do i do?
 one year ago

mebs Group TitleBest ResponseYou've already chosen the best response.1
what else is there to do other than add it ?
 one year ago

nikkinicholaou Group TitleBest ResponseYou've already chosen the best response.0
I dont know!! haha
 one year ago

mebs Group TitleBest ResponseYou've already chosen the best response.1
haha well did I verify it ..now your done!
 one year ago

nikkinicholaou Group TitleBest ResponseYou've already chosen the best response.0
thank you so extremely much. :)
 one year ago

cambrige Group TitleBest 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!!
 one year ago
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