Viète à grande Vitesse or Accelerated Viète (kind of)

[Albert Chan]

Using x/asin(x) coefficients, we may divide by correction instead of multiply

\(\displaystyle \pi \approx \frac{\pi{'}}{
\left[1-\frac{1}{6}\left(\frac{\pi{'}}{2^{n+1} }\right)^2\right]
\left[1-\frac{17}{360}\left(\frac{\pi{'}}{2^{n+1} }\right)^4\right]
\left[1-\frac{9}{280}\left(\frac{\pi{'}}{2^{n+1} }\right)^6\right]
\left[1-\frac{37579}{1814400}\left(\frac{\pi{'}}{2^{n+1} }\right)^8\right]}\)