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Numerade Educator



Problem 74 Medium Difficulty

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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Video Transcript

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