[HP 35s] Hosoda trig program giving incorrect answers to certain angles

[toml_12953]

(08-05-2015 02:36 PM)Marcio Wrote:  Hello all,

After clearing all variables and registers, I noticed that Hosoda gives wrong answers to certain angles (cosine) on my 35s:
\[
\begin{matrix} & Hosoda & 35s & 34s \\ 5 & 9.96194698092E-1 & 9.96194698092E-1 & 9.96194698092E-1 \\ 75 & 2.58819045098E-1 & 2.58819045103E-1 & 2.58819045103E-1 \\ 89.999 & 1.74532948958E-5 & 1.74532925091E-5 & 1.74532925191E-5 \\ 89.9999 & 1.74532489662E-6 & 1.74532925000E-6 & 1.74532925199E-6 \end{matrix}\]

Does anybody have any idea as to what is happening? Maybe I am missing something here?

I have already double-checked all program lines and everything is exactly as before.

Very much appreciated.

Marcio

Could it be related to the fact that near 90° the 35s trig functions have very limited accuracy? (about four digits only)

Tom L