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Asked by Nicole

give and exact value for cos(2pi/3)
14 years ago

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Answered by Damon
2 pi/3 radians = 360/3 = 120 degrees
180 -120 = 60
so
60 degrees above -y axis in quadrant 2
so
-1/2
14 years ago
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give and exact value for cos(2pi/3)

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