SOLUTION: Which of these angles is not coterminal with the others? 11pie/6 17pie/6 -7pie/6 -19pie/6

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Question 836151: Which of these angles is not coterminal with the others?
11pie/6
17pie/6
-7pie/6
-19pie/6
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Which of these angles is not coterminal with the others?
11pie/6 = 1 5/6 pi
17pie/6 = 2 5/6 pi = 5/6 pi
-7pie/6 = -1 1/6 pi
-19pie/6 = -3 1/6 pi = -1 1/6 pi
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Ans: 3rd and 4th are coterminal
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Cheers,
Stan H.