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OpenStudy (anonymous):
hi friends what is Wallis formula??
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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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