Question 546097: determine the exact value of cot 5pi/3 by using its co function identity
Answer by lwsshak3(11628)   (Show Source):
You can put this solution on YOUR website! determine the exact value of cot 5pi/3 by using its co function identity
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I'm not sure what you meant by co function identity, but this is how I would do it.
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From its initial position, rotate terminal side 2-2/3 π radians which makes an angle of π/6 radians with the x-axis. Reference angle associate with 5π/, therefore, is π/6 in quadrant IV where cot<0.
cot 5π/6=-√3
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