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anonymous
 5 years ago
cos2theta + 2cos^2theta=2
anonymous
 5 years ago
cos2theta + 2cos^2theta=2

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anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0kno any thing about square root

myininaya
 5 years ago
Best ResponseYou've already chosen the best response.0so we have 3cos^2theta=2

myininaya
 5 years ago
Best ResponseYou've already chosen the best response.0take the square root of both sides costheta=2/3 and costhetha=2/3

myininaya
 5 years ago
Best ResponseYou've already chosen the best response.0thetha=arccos(2/3) and thetha=arcsos(2/3)

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0how did you get 3cos^2theta=2 if they aren't like terms so you can't combine them

myininaya
 5 years ago
Best ResponseYou've already chosen the best response.0oh I thought they were both raised to the second power my bad

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0oh ok but do you understand it?

anonymous
 5 years ago
Best ResponseYou've already chosen the best response.0yea, i got the same answer before doing it a different longer complex way but its good.
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