prove-1-1-1-2-1-1-2-2-1-1-3-2-upto-infinity-1-sinh-

Question Number 36338 by tanmay.chaudhury50@gmail.com last updated on 31/May/18

p r o v e (1 + \frac{1}{1^{2}}) (1 + \frac{1}{2^{2}}) (1 + \frac{1}{3^{2}}) \dots u p t o i n f i n i t y

= \frac{1}{Π} s i n h Π