SOLUTION: find two values of t in [0,2pi] that make cos t = -(sqrt3/2) true without a calculator

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Question 860877: find two values of t in [0,2pi] that make cos t = -(sqrt3/2) true without a calculator
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Find two values of t in [0,2pi] that make cos t = -sqrt(3)/2 true without a calculator
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Reference angle:: t = pi/3
Solution in QII:: t = (2/3)pi
Solution in QIII:: t = (4/3)pi
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Cheers,
Stan H.
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