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OpenStudy (anonymous):
10. If tan(x) =4/3 and x is in quadrant III, find cos(x).
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OpenStudy (dumbcow):
set up a triangle in quad3 use SOH CAH TOA tan = opp/adj |dw:1394578638154:dw| From the triangle, find cos cos = adj/hyp --> cos = -3/5
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