HP 12c Platinum Virtual Calculator Trigs (emulator state file)

[Gerson W. Barbosa]

HP-12C Platinum keystrokes:

9
R/S
g GTO 090 R/S
g GTO 100 R/S
g GTO 178 R/S
g GTO 157 R/S
g GTO 137 R/S


HP-15C keystrokes:

9
SIN
COS
TAN
g TAN-¹
g COS-¹
g SIN-¹

More information and instructions here.

Link to HP Emulators, including the HP 12c Virtual Calculator:

http://www.calculatrices-hp.com/index.ph...emulateurs (Thanks, Franz!)

Steps 277 through 399 are optional and can be deleted if necessary (in this case change line 268 to GTO 000).

12C_Platinum_Trigs.zip: Same as the US (THEM?:-) version, except that DECIMAL POINT IS COMMA.

[EdS2]

How do these trig functions compare to Valentin Albillo's?
(http://www.hpcc.org/datafile/hp12/12c_Tr...ctions.pdf)

[Gerson W. Barbosa]

(01-26-2015 09:07 AM)EdS2 Wrote:  How do these trig functions compare to Valentin Albillo's?
(http://www.hpcc.org/datafile/hp12/12c_Tr...ctions.pdf)

Fast and Accurate Trigonometric Functions on the HP-12C Platinum

- Angle modes (DEG, RAD, GRAD);

- The stack register Y is preserved;

- Wider input range while keeping the same accuracy (SIN, COS, TAN: |x| < 1E12 degrees);

- All functions are computed independently;

- Mostly fixed execution times regardless of the arguments;

- More accurate results (mainly because the HP 12c Platinum doesn't round intermediate results to 10 digits);

- Faster method (Minimax polynomial rather than Taylor series);

- At least 276 steps long, plus 15 registers;

- It works on the HP 12c Platinum only.

Valentin was limited to only 99 steps however, so his achievement is quite remarkable. I wonder what he could have done with four times more programming steps! (He would never need that much, in the first place).

Regards,

Gerson.

[EdS2]

Thanks! Just the degrees mode could be a crucial advantage.