Universal constants [1] have about 6-9 significant digits today. I wouldn't use more than 10 digits of pi, if I am working on some physical calculations. [1] h

Universal constants [1] have about 6-9 significant digits today. I wouldn't use more than 10 digits of pi, if I am working on some physical calculations. [1] http://physics.nist.gov/cuu/Constants/index.html http://physics.nist.gov/cuu/Constants/index.html