Program for converting degrees to radians and vise versa (HP Prime)
04-03-2022, 06:39 PM
Post: #1
 IsaiahG0701 Junior Member Posts: 9 Joined: Mar 2022
Program for converting degrees to radians and vise versa (HP Prime)
I remember on the previous update I created a program that could convert degrees to radians and radians to degrees in maybe 1 or 2 keystrokes. Unfortunately, this program is no longer supported on my calculator. Rather than go through the units and do the tedious process of conversions. Is there a quicker and more effective method to do this. I remember the program being called D2R (Degrees to radians) and R2D (Radians to degrees).
04-04-2022, 05:33 AM
Post: #2
 Tyann Senior Member Posts: 389 Joined: Oct 2014
RE: Program for converting degrees to radians and vise versa (HP Prime)
(04-03-2022 06:39 PM)IsaiahG0701 Wrote:  I remember on the previous update I created a program that could convert degrees to radians and radians to degrees in maybe 1 or 2 keystrokes. Unfortunately, this program is no longer supported on my calculator. Rather than go through the units and do the tedious process of conversions. Is there a quicker and more effective method to do this. I remember the program being called D2R (Degrees to radians) and R2D (Radians to degrees).

Bonjour
Voici ce que j'utilise, si ça peut vous aider.

Hello
Here's what I use, if it helps.

Code:
 EXPORT D_R(d) // Valeur en ° BEGIN  UVAL(CONVERT(d*1_deg,0_rad)); END; EXPORT R_D(r) // Valeur en radians BEGIN  UVAL(CONVERT(r*1_rad,0_deg)); END;

Sorry for my english
04-04-2022, 05:42 AM
Post: #3
 IsaiahG0701 Junior Member Posts: 9 Joined: Mar 2022
RE: Program for converting degrees to radians and vise versa (HP Prime)
Thank you so much! To start this would I go to the program tab?
04-04-2022, 10:53 AM
Post: #4
 Tyann Senior Member Posts: 389 Joined: Oct 2014
RE: Program for converting degrees to radians and vise versa (HP Prime)
(04-04-2022 05:42 AM)IsaiahG0701 Wrote:  Thank you so much! To start this would I go to the program tab?

Oui vous allez dans l'onglet programme et vous créez un nouveau programme
puis vous entrez le code de ces 2 fonctions.

Yes you go to the program tab and create a new program
then you enter the code of these 2 functions.

Sorry for my english
04-04-2022, 12:15 PM (This post was last modified: 04-04-2022 12:16 PM by Didier Lachieze.)
Post: #5
 Didier Lachieze Senior Member Posts: 1,641 Joined: Dec 2013
RE: Program for converting degrees to radians and vise versa (HP Prime)
As these programs are single line programs you can also define user functions using the Shift Define key (to the right of the Units key):

Just use upper case letters for the variables : D and R instead of d and r.
04-05-2022, 04:42 PM
Post: #6
 IsaiahG0701 Junior Member Posts: 9 Joined: Mar 2022
RE: Program for converting degrees to radians and vise versa (HP Prime)
Thank you so much! With these programs would I be able to simplify a decimal number into radian form? Like if I were to do 7.5*(4pi/135) and get .698. Would I be able to have this simplified into 2pi/9
04-07-2022, 12:36 PM
Post: #7
 roadrunner Senior Member Posts: 446 Joined: Jun 2015
RE: Program for converting degrees to radians and vise versa (HP Prime)
(04-05-2022 04:42 PM)IsaiahG0701 Wrote:  Would I be able to have this simplified into 2pi/9

Not with the programs above, but this:

Code:
EXPORT radexact(D) BEGIN  CAS(EVAL("exact("+(D/π)+")"))*CAS(π); END;

program does do what you want.
10-13-2022, 10:15 PM
Post: #8
 forexbob Junior Member Posts: 10 Joined: Nov 2018
RE: Program for converting degrees to radians and vise versa (HP Prime)
(04-05-2022 04:42 PM)IsaiahG0701 Wrote:  Would I be able to have this simplified into 2pi/9

Not with the programs above, but this:

Code:
EXPORT radexact(D) BEGIN  CAS(EVAL("exact("+(D/π)+")"))*CAS(π); END;

program does do what you want.

Hi,

I know this is late to the game... but I tried the above radexact program and it gives a strange result. I entered 45 degrees and it returned 38,646,433/2,698,030*pi when I would have expected pi/4. Is that an issue with Prime or the results that I can expect, which are not correct.

Thanks to anyone still "listening" to this thread.

Bob
10-23-2022, 08:26 PM (This post was last modified: 10-23-2022 08:27 PM by Ioncubekh.)
Post: #9
 Ioncubekh Junior Member Posts: 42 Joined: Oct 2022
RE: Program for converting degrees to radians and vise versa (HP Prime)
Python math library has radians() & degrees() functions. Remember beforehand do
Code:
from math import *

HP Prime G1
Python via Android Termux...
 « Next Oldest | Next Newest »