The story
Devised by astronomer John Machin.
Etymology from Wiktionary, CC BY-SA 4.0.
Machin's formula
Today it means: A formula for calculating the digits of pi: π/4=4 arctan 1/5- arctan 1/(239) Full definition →
Today it means: A formula for calculating the digits of pi: π/4=4 arctan 1/5- arctan 1/(239) Full definition →
Devised by astronomer John Machin.
Etymology from Wiktionary, CC BY-SA 4.0.