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I have a better one : π ≈ 2
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Found the engineer

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Viète's formula is a special case of a formula derived by Euler who expressed sinx / x as infinite product. But Viète obtained his formula by comparing areas of regular polygons with 2^n & 2^(n+1) sides inscribed in circle.pic.twitter.com/dTfBBlIl5I
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And that's just because he couldn't get anywhere with 1
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Can't you just replace all the 2's with ( 1 + 1 )?
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Viète was the first person to uncover any form of convergent infinite product, not just for π. Wallis later discovered the beautiful result in the 17th Century: π = 2/1*2/3*4/3*4/5*... As it turned out however, this was simply a corollary of Euler's infinite product for sine.
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I meant to say π/2 for the Wallis Product, not π*
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