Limit Involving a Product of a Sequence: $\lim _{x\to\infty }\left(1-\frac1{2^2}\right)\left(1-\frac1{3^2}\right)\dots\left(1-\frac1{x^2}\right)$
Finding Value of the Infinite Product $\prod \Bigl(1-\frac{1}{n^{2}}\Bigr)$