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January 30, 2015

January 30, 2015

Posted by **Lori** on Sunday, February 28, 2010 at 3:46pm.

Do not use a calculator.

- Trig -
**Reiny**, Sunday, February 28, 2010 at 4:01pm4pi/3 is in quadrant III

the tangent of a 3rd quadrant angle is positive so

cot(4pi/3)

= 1/tan(4pi/3) , the angle in standard position is pi/3

= 1/tanpi/3

= 1/√3

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