Gauss's Machin-Like Formula

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More things to try:

• gauss's machin-like formula
• arcsin(1/2)
• Euler phi

Cite this as:

Weisstein, Eric W. "Gauss's Machin-Like Formula." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/GausssMachin-LikeFormula.html

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