# Get $\pi$ decimals by hand

I recognize that there was an individual that can get 100 decimal figures of $\pi$ prior to computer systems had the ability to get thousands.

Just how did the individual do that?

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2019-12-02 02:50:08
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According to Wikipedia, John Machin incorporated the formula $$\frac{\pi}{4}=4\cot^{-1}5-\cot^{-1}239$$ with the Taylor collection development for the inverted tangent in order to calculate $\pi$ to 100 decimal areas.

A previous document resulted from Abraham Sharp that made use of an arcsine collection to locate 72 decimal figures.

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2019-12-03 04:25:55
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This web page on the chronology of pi has several valuable notes on just how the pre - computer system period estimations of $\pi$ were executed.

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2019-12-03 04:25:52
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See additionally Pi: A Source Book.

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2019-12-03 04:24:54
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