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`cot(pi/20).cot((3pi)/20)cot((5pi)/20)cot((7pi)/20)cot((9pi)/20)=....`

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`cot(pi/20).cot((3pi)/20)cot((5pi)/20)cot((7pi)/20)cot((9pi)/20)=....`
A. -1
B. 0
C. 1
D. none of these
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1 Answer

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Correct Answer - C
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