▲ 6 r/hpcalc+1 crossposts

HP 35S sine errors

Got this off of Wikipedia:

Here are some results of math done on a HP 35S compared with what the displayed result should be.

 sin(1E-1): 1.74532836590E-3
 Answer SB: 1.74532836590E-3
                 (correct)
 sin(1E-2): 1.74532924306E-4
 Answer SB: 1.74532924313E-4
                       ^^
 sin(1E-3): 1.74532925091E-5
 Answer SB: 1.74532925191E-5
                      ^^^
 sin(1E-4): 1.74532925000E-6
 Answer SB: 1.74532925199E-6
                      ^^^
 sin(1E-5): 1.74532920000E-7
 Answer SB: 1.74532925199E-7
                     ^^^^
 sin(1E-6): 1.74532900000E-8
 Answer SB: 1.74532925199E-8
                    ^^^^^
 sin(1E-7): 1.74532000000E-9
 Answer SB: 1.74532925199E-9
                   ^^^^^^
 sin(1E-8): 1.74532925199E-10
 Answer SB: 1.74532925199E-10
                 (correct)
 sin(1E-9): 1.74532925199E-11
 Answer SB: 1.74532925199E-11
                 (correct) 
reddit.com
u/Fear_The_Creeper — 2 months ago

Quelqu'un a dû gérer des ennuis et troubles pendant plus de 15 ans ?

Bonjour,

Cela fait longtemps que je n'ai pas posté ici. Mon problème en ce moment, c’est que ça fait presque 20 ans que je subis des traumatismes plus ou moins lourds (voire intolerables) et qu’aujourd’hui je ne sais même plus quoi penser de ma situation. Parents maltraitants et manipulateurs, ambiance domestique violente entre eux, police, tout le temps à venir dans mon espace pour se servir de moi, impossibilité de dire non sinon retalation. Aucun respect pour les diverses maladies que je traverse (et si jamais je le mentionne, la seule réponse est qu'eux aussi ont des maladies). J’ai tellement accepté de choses que je n’arrive plus à savoir ce qui est acceptable ou pas. Je peux aller loin, mais j’ai l’impression de perdre les dernières miettes de mon enfance.

Bref, si des personnes ont déjà été dans une situation similaire, je veux bien vos témoignages

reddit.com
u/agumonkey — 2 months ago
▲ 69 r/hpcalc+1 crossposts

HP-28S with an order of Hash Browns.

Filmed on location at Waffle House. And it pretty much looks brand new.

u/BadOk3617 — 5 months ago
▲ 188 r/hpcalc+1 crossposts

The HP-67 seems out of this world

I've always wanted one of these. Today a very kind person sent me what was needed to fire this machine up. The HP-67 was a powerful programmable calculator/computer, which could read and write strips of magnetic cards to load programs in 1976. Out of all the classic HP calculators, the HP-67 stuck out for me - the ambition in its input/output, and the beautiful key colours which have become emblemic of HP's peak (I'm assuming Calculator Clique felt similarly). The 15 digit LED display is also remarkably crisp and the digits look sharper than modern LCDs.

On the other hand, while this is in some ways my 'grail' calculator, it's also not one I'd use day to day. The keyboard is heavily overloaded with functions, and most keys relate to its programming ability. Hugely powerful, but maybe not so great as a general-use calculator.

PS Photographed on a Nikon Df, Micro-Nikkor 55mm at f16 on glass with real clouds present. The display is not so clear, even in the shade in fact, but it's pretty bright indoors. I may wait for the sun to go down and see if I can get a clearer shot of the LEDs. I also added a photo of its predecessor, the HP-65, being used to calculate course correction times for Apollo-Soyuz mission.

u/agumonkey — 5 months ago