Could someone do a calculation on a real 71B?
01-16-2017, 01:40 PM
Post: #7
 Gerson W. Barbosa Senior Member Posts: 1,452 Joined: Dec 2013
RE: Could someone do a calculation on a real 71B?
(01-16-2017 11:14 AM)Thomas Okken Wrote:
(01-16-2017 10:31 AM)EdS2 Wrote:  It's more enlightening to ask for the sin of a number just below pi, because then you get more digits of pi.

Neat! I never realized that.
It works for the number just above pi, too; you just get the ten's complement of those extra digits:

Code:
10.00000000000E-10 -4.10206761537E-10 ------------------  5.89793238463E-10

I guess the point is that the calculator performs argument reduction using an extended-precision approximation of pi. Next question, for extra credit: how many digits?

That's an old trick (see http://www.hpmuseum.org/forum/post-18529.html#pid18529), but I wasn't aware of the 10's complement part. Thanks!

Gerson.
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 Messages In This Thread Could someone do a calculation on a real 71B? - zeno333 - 01-15-2017, 08:59 AM RE: Could someone do a calculation on a real 71B? - Gerson W. Barbosa - 01-15-2017, 09:24 AM RE: Could someone do a calculation on a real 71B? - Didier Lachieze - 01-15-2017, 09:26 AM RE: Could someone do a calculation on a real 71B? - EdS2 - 01-16-2017, 10:31 AM RE: Could someone do a calculation on a real 71B? - Thomas Okken - 01-16-2017, 11:14 AM RE: Could someone do a calculation on a real 71B? - J-F Garnier - 01-16-2017, 01:18 PM RE: Could someone do a calculation on a real 71B? - Thomas Okken - 01-17-2017, 03:19 AM RE: Could someone do a calculation on a real 71B? - Gerson W. Barbosa - 01-16-2017 01:40 PM RE: Could someone do a calculation on a real 71B? - KeithB - 01-17-2017, 12:02 AM

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