atan(x) = asin(x / sqrt(1+x\*x)) | Hacker News

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paulddraper 6 months ago | parent | context | favorite | on: Even faster asin() was staring right at me

atan(x) = asin(x / sqrt(1+x*x))

fatih-erikli-cg 6 months ago [–]

So the asin is brute force. I think it is `atan` function. Written article explains nothing. Sqrt is also like that.

It looks like there is a reasonable explanation when it is written math form but there is no.

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