Easter Sunday Trigs ( rpn38-CX)

[bshoring]

(03-31-2016 04:43 AM)Gerson W. Barbosa Wrote:  

(03-31-2016 12:45 AM)bshoring Wrote:  Very nice program. I saved it as "Trigs2.2 (sin in X)".

After playing with it for a while, I decided I still like having sin in Y and cos in X, so I deleted line 30 and updated my instructions. Saved that as "Trigs2.3 (cos in X)".

Thanks! Alternatively you can replace line 30 with a GTO 00 instruction, so that the entry point of the inverse functions don't change.

(03-31-2016 12:45 AM)bshoring Wrote:  Since I now have several Trig programs and each has different line numbers to GOTO for ASIN, ACOS & ATAN, I came up with an interesting way to remind myself where they are for a given program, so I don't have to write it down. Since HP financial calculators have special 1-byte registers (0-20) for recording the number of cash flows I decided to use Nj registers 0-2 to store those line numbers. If I forget where ATAN starts, I can just tap the display briefly to bring up the Register View and I can see 31, 42, 50, per the image attached.

Nice trick! I will it with other programs.

(03-31-2016 12:45 AM)bshoring Wrote:  I spoke to Willy about the problem with pasting registers to the display. He's aware of the problem and hopes to fix it in the next update of the app. In the meantime, a workaround is to go into SETTINGS (tap the wrench icon) and for the Decimal Point, select the first option "." And then hit SAVE before attempting to paste registers. Then after copying you can always set the decimal point setting to your preference.

Perhaps both "," and "." should be interpred as radix points. Thus,

R.0: 5,817764173314432e-03
R.1: 0.199999779
R.2: 0,142841665

would be converted either to

R.0: 5.817764173314432e-03
R.1: 0.199999779
R.2: 0.142841665

or

R.0: 5,817764173314432e-03
R.1: 0,199999779
R.2: 0,142841665

depending on the user settings.

(03-31-2016 12:45 AM)bshoring Wrote:  After the next app update for RPN-38 CX, it shouldn't matter which decimal point setting you use.

It would be nice if the next update includes the last version of Trigs, the one that leaves sine in X. Sure, the library already includes Valentin Albillo's famous HP-12C Tried & Tricky Trigonometrics. Speed is not a problem anymore, but results in radians are rather inconvenient for those of us who use mostly degrees.

Best regards,

Gerson.

Gerson, I think some of those issues, with respect to radix may be addressed in the next update as well as some other improvements. I agee with you on Trig. I'd rather work in degrees. If you have any ideas, feel free to email Willy. He's a very nice guy and very responsive. Very open to suggestions and he just wants to make the best emulators he possibly can. Just don't ask him for anything Abdroid. He's not into that system.

I'm having fun with your trig programs. As a financial guy I didn't begin to learn about trig functions until a year or two ago. Your programs have been a good learning experience for me.

Thanks!