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OpenStudy (anonymous):
I have a problem! How do you evaluate cos 4pi/3
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OpenStudy (jdoe0001):
define "evaluate"
OpenStudy (anonymous):
I guess its solve, thats how my book worded it :/
OpenStudy (dumbcow):
look up a unit circle or use fact that reference angle of 4pi/3 is pi/3 and 4pi/3 is in Quadrant 3
OpenStudy (anonymous):
I'm still a bit confused on it though but thank you!
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