linda
  • linda
what is sine 2 pi over 3
Mathematics
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linda
  • linda
what is sine 2 pi over 3
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
in trig, pi is equal to 180 so you substitute it
anonymous
  • anonymous
2(180)/3 360/3 120 sin(120)=.8660
anonymous
  • anonymous
2PI/3 is the same as 2/3 PI. We also know that Pi on the unit circle is 180 degrees, and 2/3 of 180 is 120. On the unit circle its coordinates would be (-1/2, sqrt(3)/2) and the y value is always your sin, so your answer is sqrt(3)/2.

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