33 Forensic?

[Arnaud Amiel]

Would a nice owner of a shiny new 33s tell us what is in degrees DISP ALL.

9 SIN COS TAN ATAN ACOS ASIN

Thanks,

Arnaud

[Nenad (Croatia)]

Better:

9 SIN COS TAN ATAN ACOS ASIN 9 - EEX 6 *

The answer is in ppm error (as somebody once said)

[Paul Brogger]

Chasing guard digits doesn't further refine the value above, which is available immediately via the SHOW feature.

I'd already reported this to Mike Sebastian.

[Nelson M. Sicuro (Brazil)]

This means that they are using another algorithm, not only a
Saturn CPU emulation on a newer CPU.

There is any way to measure its speed?

Try this on "Solve" (Algebrical TVM formula, please modify it where necessary):

(1+i)^n*pv+((1-(1+i)^n)/(1-(1+i)))*pmt+fv=0

This works on my HP-95LX with 16 digits precision:

n=31,536,000

i=1/315,360,000

pv=0

pmt=-0.01

calculate for fv.

Some results:

HP-95LX : 331,667.0056360354

HP-17BII: 331,661.800473

Internal TVM (take same i mult. by 100):

HP-95LX : 331,667.0066907769

HP-17BII: 331,667.006691

HP-10BII: 331,667,006691

HP-12C  : 331,667,0067

(Example taken from MATHEMATICS WRITTEN IN SAND by W. Kahan)

Best regards,

Nelson

[John]

The 49g+ equation solver gets the same result as the 17BII solver, 331,661.800473

The 49g+ financial solver is more accurate, returning 331,667.0067.

[Nelson M. Sicuro (Brazil)]

I think that the HP-95LX/200LX (and other HP palmtops) solvers in the "HP Calc" program is the most accurate solver that I knof of! It uses 16 digits (I don't know how much it uses internally) and the answer is even better than the HP-49G+...

BTW The 95LX "forensics" result is

9.000000000029575

Best regards,

Nelson

Edited: 20 Feb 2004, 3:31 p.m.

[bill platt]

32sii Equation editor:

Entered (1+i)^n*pv+((1-(1+i)^n)/(1-(1+i)))*pmt+fv as an expression, (checksum 41D6, 57.0 bytes)

and solved for fv: got 331,661.800473 (Same as 17bii and 95LX solvers)