SOLUTION: cot(-8*pi/3) it needs to be done without a calculator

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Question 453522: cot(-8*pi/3)
it needs to be done without a calculator
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
cot(-8*pi/3)
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= cot(-2(pi)-(2/3)pi)
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= cot(-(2/3)pi)
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= cot (pi/3)
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= sin(pi/3)/cos(pi/3)
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= [sqrt(3)/2)]/[1/2)
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= sqrt(3)
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Cheers,
Stan H.