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dakid91
Group Title
Use the double angle formula to rewrite the equation y = 4sin^2 (slashed zero)  2.
 2 years ago
 2 years ago
dakid91 Group Title
Use the double angle formula to rewrite the equation y = 4sin^2 (slashed zero)  2.
 2 years ago
 2 years ago

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tdabboud Group TitleBest ResponseYou've already chosen the best response.2
is the slashed zero theta?
 2 years ago

tdabboud Group TitleBest ResponseYou've already chosen the best response.2
it reduces to \[y = 2 \cos(2\theta)\]
 2 years ago

dakid91 Group TitleBest ResponseYou've already chosen the best response.0
Can you show me how it works?
 2 years ago

tdabboud Group TitleBest ResponseYou've already chosen the best response.2
You need to simply use that cos(2A) = 1 2 sin^2(A)
 2 years ago

tdabboud Group TitleBest ResponseYou've already chosen the best response.2
so from this we take theta to be A
 2 years ago

tdabboud Group TitleBest ResponseYou've already chosen the best response.2
if you rewrite the equation you gave in that form it becomes.. 2 + 4sin^2(A)
 2 years ago

tdabboud Group TitleBest ResponseYou've already chosen the best response.2
from here we can factor out a 2 which leaves us with 2(12sin^2(A)) and you can see that the values under the parenthesis is just cos(2A) from the identity. So the answer you end up with after plugging in theta for A, is just 2cos(2Theta)
 2 years ago

tdabboud Group TitleBest ResponseYou've already chosen the best response.2
do you understand?
 2 years ago

dakid91 Group TitleBest ResponseYou've already chosen the best response.0
Yes. Thank you for giving a detailed explanation.
 2 years ago

tdabboud Group TitleBest ResponseYou've already chosen the best response.2
yeah no problem, glad i could help
 2 years ago
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