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 one year ago
Verify the identity.
sin (4u) = 2 sin (2u) cos (2u)
Please help, verifying these kind of equations is tricky for me.
 one year ago
Verify the identity. sin (4u) = 2 sin (2u) cos (2u) Please help, verifying these kind of equations is tricky for me.

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slaaibak
 one year ago
Best ResponseYou've already chosen the best response.1Hmm. you can try doing it like this: sin(2u + 2u) = sin(2u) * cos(2u) + cos(2u) * sin(2u) = 2sin(2u)*cos(2u) Note: I referred to: sin(A + B) = sinAcosB + cosAsinB

6532bunny
 one year ago
Best ResponseYou've already chosen the best response.0Oh, I see. Is that the final answer?

6532bunny
 one year ago
Best ResponseYou've already chosen the best response.0I mean, is that it? Usually these questions take up more space. >_<

slaaibak
 one year ago
Best ResponseYou've already chosen the best response.1I'm pretty sure it is, yes

AravindG
 one year ago
Best ResponseYou've already chosen the best response.0you can also use the identity that \[\bf \large \boxed{\sin 2A= 2\sin A \times \cos A }\]

AravindG
 one year ago
Best ResponseYou've already chosen the best response.0treating \[4u=2 \times (2u) \]
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