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OpenStudy (anonymous):
what is sin 2pi/3? how do you solve wihtout a calculator?
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OpenStudy (amistre64):
memorizing the unit circle
OpenStudy (anonymous):
you could use \(sin(\pi/3+\pi/3) \) and use an identity.
OpenStudy (anonymous):
I am not sure why you picked sin60 and not sin30. how do you know which one to pick?
OpenStudy (amistre64):
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