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cot(pie/20)cot(3pie/20)cot(5pie/20)cot(7pie/20)cot(9pie/20) is.. -1 1/2 0 1

cot(pie/20)cot(3pie/20)cot(5pie/20)cot(7pie/20)cot(9pie/20) is..
-1
1/2
0
1

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2 Answers

Chetan Mandayam Nayakar
312 Points
9 years ago

cot(pi/20)cot(9pi/20)=1=cot(3pi/20)cot(7pi/20)=cot(5pi/20)

hemant kadam
4 Points
9 years ago

thnx bro..

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