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" 3.Prove that "cot(pi)/(20)cot(3 pi)/(2...

" 3.Prove that "cot(pi)/(20)cot(3 pi)/(20)cot(5 pi)/(20)cot(7 pi)/(20)cot(9 pi)/(20)=1

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

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

cot((pi)/(20))cot((3 pi)/(20))cot((5 pi)/(20))cot((7 pi)/(20))cot((9 pi)/(20))cot((15 pi)/(20))=

Prove that "cot"(pi)/(8)"cot"(3pi)/(8)"cot"(5pi)/(8)"cot"(7pi)/(8)=1.

cot. (pi)/(20) cot. (3pi)/(20) cot. (5pi)/(20) cot. (7pi)/(20) cot. (9pi)/(20) cot. (15pi)/(20)=

Prove that cot(pi/4-2cot^(- 1)3)=7

Prove that cot(pi/4-2cot^(- 1)3)=7

tan((pi)/(20))tan(3(pi)/(20))tan(5(pi)/(20))tan(7(pi)/(20))tan(9(pi)/ (20))

Prove that cot((pi)/(4)-2cot^(-1)3)=7