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Mathematics
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Mar 12th, 2015

The reference angle is pi/6 (or 30 degrees) in the 3rd quadrant.

tangent is positive in the 3rd quadrant, so cotangent is positive also.

cot(pi/6) = sqrt(3)

Mar 13th, 2015

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Mar 12th, 2015
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Mar 12th, 2015
Dec 9th, 2016
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