Approximate pi to 24 digits via keyboard

[EdS2]

(01-31-2015 07:06 AM)Dieter Wrote:  It works on calculators with a sufficient number of internal digits of pi.

To be pedantic, it works on calculators with sufficiently accurate trig calculations - although probably all calculators do range reduction, and use some approximation to pi in doing so, in fact it's possible to calculate sin(x) without doing range reduction: in which case you need no information about the value of pi. Here are the first few partial sums for sin(3.1415):

Code:

3.1415
-2.0257555664
0.524032441414
-0.0751083819636
0.00701570299194
-0.000352337205218
0.000113786850196
9.18811898433e-05
9.26759966426e-05
9.26530610696e-05