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(Solved): Find the sum; i.e., exact value of \[ \sum_{n=0}^{\infty} \frac{(-1)^{n} \pi^{2 n}}{3^{2 n}(2 n) !} ...
Find the sum; i.e., exact value of \[ \sum_{n=0}^{\infty} \frac{(-1)^{n} \pi^{2 n}}{3^{2 n}(2 n) !} \]
Find the length of the cardioid \( r=1-\cos \theta \)
![Find the sum; i.e., exact value of
\[
\sum_{n=0}^{\infty} \frac{(-1)^{n} \pi^{2 n}}{3^{2 n}(2 n) !}
\]](https://media.cheggcdn.com/study/deb/deb71831-cfa1-4692-ba00-40060218d778/image)
