[WP-34S] DEG and RAD - diffs

[Dieter]

(06-05-2014 12:08 AM)pito Wrote:  With WP34S emulator v3.3.3605 and 9degree test

As you already said: it's a test for identifying chipsets and algorithms where the input is 9 degrees. So there is not much sense in using this with an input of 9 radians.

Quote:Is that a feature or a bug?

Of course a completely different input leads to a different output. So yes, this is a feature. It is called "accuracy". ;-) In the first example you used 9 degrees, in the second case it's 9 radians = 515,662 (or 155,662) degrees. So already the first step gives completely different results: sin 9° = 0,1564 while sin 9 rad = 0,4121.

I wonder how you got a result near 9 even in radians mode. The inverse trig functions do not return values beyond 2 pi. Trying the "test" in radians mode the 34s returns 0,42477796... Which simply is pi – (9 mod pi).

I hope you do not consider this a test that tells anything about accuracy. It's not, and the reasons have been discussed in detail. This "forensic test" is intended for identifying (especially older) calculators with regard to their built-in hardware and software.

Dieter