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| Question 757245:  sin x<0 Is it in Quadrant I, Quadrant II, Quadrant III, Quadrant IV, or a Quadrant Angle?
 Answer by stanbon(75887)
      (Show Source): 
You can put this solution on YOUR website!  sin x<0 Is it in Quadrant I, Quadrant II, Quadrant III, Quadrant IV, or a Quadrant Angle? ----
 On the unit-circle sin(x) is the y-value.
 So y is negative  in QIII and in QIV.
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 Cheers,
 Stan H.
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