We also computed Pi using Mathcad Engine Plus, the operations took from 5-8 minutes to compute the results on a 586, 32 MB RAM and 90 Mhz for speed. So the operation might more or less time depending on your computer and the interval of n.
The first formula was used to calculate Pi to 15 decimals (n = 0 to 10000000) :
then Pi = 3.141592653589793
Also the formula that was found by integrating the unit circle and finding it's area gave us the value of Pi using Mathcad. You're gonna find that this one is so much faster to compute than the preceding one! We calculated Pi only to 10 decimal places:
Pi = 3.1415926535
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