SOLUTION: sketch each angle and its reference triangle in the unit circle. then sketch use the sketch to find each exact value. problem below.
sin 2π/3
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sin 2π/3
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Question 1111069: sketch each angle and its reference triangle in the unit circle. then sketch use the sketch to find each exact value. problem below.
sin 2π/3 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! sketch each angle and its reference triangle in the unit circle. then sketch use the sketch to find each exact value. problem below.
sin 2π/3
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Note:: 2pi/3 is in QII
To find the reference angle find the angle between the given angle
and the x-axis.
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Reference angle is pi - (2/3)pi = (1/3)pi
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Note:: Sin is positive in QII and in QI
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Sin(2pi/3) = Sin(pi/3) = 1/2
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Cheers,
Stan H.
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