let-give-a-n-k-1-n-cos-pi-k-2-and-b-n-k-1-n-sin-pi-k-2-1-find-a-equivalent-foe-a-n-and-b-n-2-find-a-equivalent-of-a-n-b-n-

Question Number 30486 by abdo imad last updated on 22/Feb/18

l e t g i v e a_{n} = \prod_{k = 1}^{n} c o s (\frac{π}{(k + 2)!}) a n d

b_{n} = \prod_{k = 1}^{n} s i n (\frac{π}{(k + 2)!})

1) f i n d a e q u i v a l e n t f o e a_{n} a n d b_{n}

2) f i n d a e q u i v a l e n t o f a_{n} . b_{n} .