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Mathematics 18 Online
OpenStudy (anonymous):

hi friends what is Wallis formula??

OpenStudy (anonymous):

http://www.youtube.com/watch?v=-cDM-xNQK18

OpenStudy (anonymous):

thanks @GParsley

OpenStudy (anonymous):

An infinite product for pi, it can be seen by the product representation of the sine function, $$\sin(x)=x\prod_{n=1}^\infty(1-\frac{x^2}{\pi^2n^2})$$

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