If you've not seen it before, here's an interesting infinite sum which relates pi and the Fibonacci numbers. Just thought it was cool how they tie together somehwere.

$\displaystyle {\pi}=4\sum_{k=1}^{\infty}tan^{-1}(\frac{1}{F_{2k+1}})$

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- Jul 1st 2007, 03:36 PMgalactuspi and fibonacci
If you've not seen it before, here's an interesting infinite sum which relates pi and the Fibonacci numbers. Just thought it was cool how they tie together somehwere.

$\displaystyle {\pi}=4\sum_{k=1}^{\infty}tan^{-1}(\frac{1}{F_{2k+1}})$