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

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Avenged7x Group TitleBest ResponseYou've already chosen the best response.0
idk even where to begin
 2 months 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)
 2 months ago

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

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

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

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

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

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

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

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