Approximate pi to 24 digits via keyboard

[Dieter]

(02-02-2015 02:57 AM)Gerson W. Barbosa Wrote:  Yes, I get extra digits on my HP-15C and even on my HP 12c Platinum :-) (*)

Extra digits don't mean extra accuracy. ;-)

The 15C (and probably also the 41C) essentially show the same behaviour as the 35s. First the result becomes slightly inaccurate, then the final digits are lost:

(02-02-2015 02:57 AM)Gerson W. Barbosa Wrote:  HP-15C:
3.1415 92653589(87)

...while it should be

3.1415 9265358966

So the last two digits are off. As we move closer to pi the result loses digits: for instance sin 3,14159 is returned as 2,65359 E–6. The best we can squeeze out of the 15C is 3,141592653590 – that's pi rounded to 13 digits.

So no miracles on this side either. ;-)

Dieter