SOLUTION: Is -11pi/4 in the third quadrant? And would the reference angle be 15pi/4? Thanks

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Question 972316: Is -11pi/4 in the third quadrant? And would the reference angle be 15pi/4? Thanks
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Is -11pi/4 in the third quadrant?
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-11pi/4 = -8pi/4 - 3pi/4 = -3pi/4 is in QIII
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And would the reference angle be 15pi/4? Thanks
No. The reference angle is always an acute angle in QI
It is the acute angle between the given angle and
the closest part of the x-axis.
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The reference angle is pi/4
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Cheers,
Stan H.
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