Asked by Nicole
give and exact value for cos(2pi/3)
Answers
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
180 -120 = 60
so
60 degrees above -y axis in quadrant 2
so
-1/2
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