find Π_(k=1) ^n cos(((kπ)/(2n+1))) and Π_(k=1) ^n sin(((kπ)/(2n+1)))


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Question Number 37885 by abdo mathsup 649 cc last updated on 19/Jun/18

$f i n d \prod_{k = 1}^{n} c o s (\frac{k π}{2 n + 1}) a n d \prod_{k = 1}^{n} s i n (\frac{k π}{2 n + 1})$
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