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how to find exact value?

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Cot200degree times -Cot 70degree

Oct 17th, 2017

cot200 = 1/tan200 = 1/tan20 (because 180 is the reference angle)

 -cot70 = -1/tan70 

(1/tan20)(-1/tan70) = -1/ (tan20)(tan70)

Dec 3rd, 2014

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Oct 17th, 2017
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Oct 17th, 2017
Oct 18th, 2017
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