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OpenStudy (ttop0816):
is this right?? Evaluate cos 11pi/6 -square root 3/2 -1/2 1/2 square root 3/2
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OpenStudy (ttop0816):
i got the first answer!
OpenStudy (snowsurf):
It would be positive. Because cos(x) is positive in the 1 and 4th quadrants of a polar coordinate system. Since 11pi/6 is in the 4th quadrant it must be positive.
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