Problem with polar form of complex numbers

12142017, 06:34 PM
Post: #1




Problem with polar form of complex numbers
Hi this my first post here, so I am sorry if this isn't the right section to post my problem.
I have a HP Prime updated to latest SW version (12066) . When I try to input a complex number in polar form with NEGATIVE angle (for example 20<45 ...by the symbol < I mean the angle symbol located at multiply key "x" of hp prime when pressed same time with shift) I got back the error message: No significant digits in number. If the angle of the polar complex negative isn't negative there is no problem...also I can input without problem the complex number with negative angle when I am in CAS mode...but is there any way to overcome this problem out of CAS mode? Thank's in advance for any help, have a nice day!!! 

12142017, 07:18 PM
Post: #2




RE: Problem with polar form of complex numbers
Use the +/ key to insert the negative sign
Viga C  TD  FB 

12142017, 07:35 PM
(This post was last modified: 12142017 07:44 PM by salvomic.)
Post: #3




RE: Problem with polar form of complex numbers
(12142017 07:18 PM)Carlos295pz Wrote: Use the +/ key to insert the negative sign yes, in fact... Don't use the minus sign. In the last beta 3 (not in previous firmware): input 20 ∢ 45 (in DEG mode, with ± sign, shift M) you get 20 ∢ 45 now press again shift ∢ it returns 14.142135623714.1421356237i then press [a b/c] and you get 10√210√2i it works :) ∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C  DM42, DM41X  WP34s Prime Soft. Lib 

12142017, 09:51 PM
(This post was last modified: 12142017 09:53 PM by Helge Gabert.)
Post: #4




RE: Problem with polar form of complex numbers
Correct for Home,
but start in CAS 20 ∢ 45 ( 45 with + button) OK now grab 20 ∢ 45 from the CAS history and press Home and Enter, and you get the error. Perhaps this is the problem the OP ran into? Notice how in CAS the + (unary) minus gets converted into the regular minus? 

12142017, 09:55 PM
Post: #5




RE: Problem with polar form of complex numbers
(12142017 09:51 PM)Helge Gabert Wrote: Correct for Home, yes, right, the ± is converted in minus passing to Home (it should be corrected, it's a little bug, yes). As a workaround it is good to change the minus in ±, for now... ∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C  DM42, DM41X  WP34s Prime Soft. Lib 

12142017, 10:34 PM
Post: #6




RE: Problem with polar form of complex numbers  
12152017, 11:26 AM
Post: #7




RE: Problem with polar form of complex numbers
For polar/rect type work, read the article in the Prime wiki here...
http://www.wiki4hp.com/doku.php?id=prime:polrec 

12152017, 12:05 PM
Post: #8




RE: Problem with polar form of complex numbers
(12152017 11:26 AM)webmasterpdx Wrote: For polar/rect type work, read the article in the Prime wiki here... Well, thank you! ∫aL√0mic (IT9CLU) :: HP Prime 50g 41CX 71b 42s 39s 35s 12C 15C  DM42, DM41X  WP34s Prime Soft. Lib 

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