Approximate pi (=3.1415926535..) using three decimal (not necessarily distinct) digits.

2 remarks:
a. Only standard algebraic operators and symbols allowed, i.e. no "!", "log", "sqrt" etc
b. Stay within the .3% error margin.
c. What accuracy of approximation is possible if a. were waived i.e. "All (except "pi") standard algebraic operators and symbols allowed,e.g. "!", "log", "sqrt", "phi", "e" etc?

(In reply to re: A little less obvious, for part c by JayDeeKay)

ln(-2/2)/sqrt(-1)

Posted by Charlie on 2017-09-05 07:40:34