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nikkinicholaou
 one year ago
Verify the identity.
sin 4x = 2 sin 2x cos 2x
nikkinicholaou
 one year ago
Verify the identity. sin 4x = 2 sin 2x cos 2x

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

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

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

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

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

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

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

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