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# Find the sum of the series.$\sum_{n = 0}^{\infty} \frac {(-1)^n \pi^{2n}}{6^{2n}(2n)!}$

## $\cos \left(\frac{\pi}{6}\right)=\frac{\sqrt{3}}{2}$

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funders of Siri's. So this is two and from zero to infinity that'LL want to cough in times Hi over six two calls to in over two in Victoria. And if you recall the experience, of course the next which is equals to one minus X cube or two. It's your tutorial, plus four or four. Victorio is so long, so this is just just co sign by order. Six. Silly. They was too square with three or two.

University of Illinois at Urbana-Champaign

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