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Avenged7x
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Prove: sin θ  sin θ•cos2 θ = sin3 θ. You must show all work.
 one month ago
 one month ago
Avenged7x Group Title
Prove: sin θ  sin θ•cos2 θ = sin3 θ. You must show all work.
 one month ago
 one month ago

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Avenged7x Group TitleBest ResponseYou've already chosen the best response.0
idk even where to begin
 one month ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Just thought Maybe you can take the right hand side and show the left hand side Try to play with this thought: sin(3x) is sin(2x+x)
 one month ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
That should be a hint to use the sum identity for sin
 one month ago

Idealist10 Group TitleBest ResponseYou've already chosen the best response.0
Memorize the identities for cos 2*theta
 one month ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Though I could be wrong but I don't think this is an identity.
 one month ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
One way to find out is to find a counterexample
 one month ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
try theta=pi/2 does not work
 one month ago

Idealist10 Group TitleBest ResponseYou've already chosen the best response.0
sin(2x)=2*sin(x)*cos(x)
 one month ago

Idealist10 Group TitleBest ResponseYou've already chosen the best response.0
cos(2x)=2cos^2 (x)1
 one month ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Maybe the problem has been written incorrectly.
 one month ago

myininaya Group TitleBest ResponseYou've already chosen the best response.1
Unless the instructions say to: Prove if true and give a counterexample if false. If so then I have accidentally given you the answer.
 one month ago

Idealist10 Group TitleBest ResponseYou've already chosen the best response.0
cos(2x)=12sin^2 (x) so what's sin(x)*cos(2x)?
 one month ago
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