Recent content by Drez1985

Yes, I'm sure; I wrote off the formula from a book called "The Age of Genius - 1300-1800" by Michael J. Bradley. Jamshid al-Kashi used the following trignometric formula (as a way to estimate pi): C_n=√2(2r+C_(n-1)) where C_1=r√3 By first substituting C_1 into the expression for C_2...

How does √(2(2r+r√3) simpilfy to r√(2r+√3) ? Read about the formula in a book about Jamshid al-Kashi, the great Iranian astronomer who used the above formula to determine pi to 16 decimal places. All help is much appreciated.