Algebraic Operation System (AOS)

[C.Ret]

(04-17-2022 12:57 AM)Thomas Klemm Wrote:  TI-57

These are the key strokes for the TI-57:

1 - 2 × 3 y^x 4 ÷ 5 + ( 6 - 7 x^2 ^ 3 1/x ) 2nd sin * 40320 + ( 9 y^x ( 2 y^x 3 ) × 45 ^ ( 6 ÷ 7 ) ) +/- x^2 lnx =

We get the same result:

1657.0089

For this I used the TI-57 Programmable Calculator.

Thank you for this excellant program allowing us to use the AOS from the historic competitor on the HP-41C !

I get a lot of fun and a great time this morning by using AOS on my HP-41C and comparing with the results obtained on a newly restored TI Programmable 58C.


Armed with the MASTER LIBRARY MODULE, the keystrokes sequences on Ti-58/59 are quite identical to the one for the TI-57. Except that the factorial function is available (Module program Pgm 16 , label A for entry n and label C to compute n!) and the x√y function is available with the INV y^x keystrokes.

These are the key strokes for the TI-58/59 armed with the MASTER LIBRARY MODULE:

2nd Deg CLR 1 - 2 × 3 y^x 4 ÷ 5 + ( 6 - 7 x^2 INV y^x 3 ) 2nd sin * 8 2nd Pgm16 A C + ( 9 y^x ( 2 y^x 3 ) × 45 y^x 6 INV y^x 7 ) +/- x^2 lnx =

We get the expected result: 1657.008948
For this I used the TI Programmable 58 C Calculator serial n°8208744.


Despite the Ti-57, the infamous Ti-57 LCD allows a simpler keystrokes sequence since this model also has factorial n! and x√y functions(°):

Press DRG until the RAD and GRAD annunciators are off.

ON/C ON/C 1 - 2 × 3 y^x 4 ÷ 5 + ( 6 - 7 x^2 INV y^x 3 ) sin * 8 2nd n! + ( 9 y^x ( 2 y^x 3 ) × 45 y^x 6 INV y^x 7 ) +/- x^2 lnx =

We get the same result as he TI 57: 1657.0089 on but on a LCD display as colorless as the HP-41.



EDIT:
(°) I am currently in a doubt, isn't the x√y function available on the red LED Ti-57 as the INV y^x keystrokes ? Please check for that, I have no TI-57 with LED and have an issue trying a simulator on Internet.