Trigonometric Functions, Degrees and cas

07172015, 04:21 PM
Post: #1




Trigonometric Functions, Degrees and cas
Today I entered sin(22.5°) in casmode, anglemode is radians, to check if it provides the intended solution, 1/2*sqrt(2sqrt(2)). Instead it delivered: sin(22.5*°), using deg from convert didn't help either, sin(45/2) was not better. Clearly with sin(45*PI/360) it worked, so I think this is another bug in the Prime, interoperation between the cas and other parts of the OS is concerned.
Arno 

07172015, 06:47 PM
(This post was last modified: 07172015 06:51 PM by roadrunner.)
Post: #2




RE: Trigonometric Functions, Degrees and cas  
07172015, 07:14 PM
Post: #3




RE: Trigonometric Functions, Degrees and cas
Hi,
In CAS mode, this make my Prime reboot! Marcel. 

07172015, 08:28 PM
(This post was last modified: 07172015 08:31 PM by parisse.)
Post: #4




RE: Trigonometric Functions, Degrees and cas
I just tried convert(1_deg,_rad) and I get 1.74...e2_rad. Make sure to type convert in lowercase.
If you want to use ° inside CAS, just do that °:=pi/180 Or run sin(45/2*pi/180) 

07172015, 08:28 PM
Post: #5




RE: Trigonometric Functions, Degrees and cas
(07172015 06:47 PM)roadrunner Wrote: 0.0174 but instead of the expected _rad unit I got 1.74532925199e−2_譕诬Ѝ抹嘁疋（ၶᯨ�ᑵ事ꄐ뤄Ţ痿０ҍֈඤat least the number is correct, sometimes I wish me a 50G with the speed, the formfactor and the display of the Prime. In other words: Everytime I do something I come to the point I find some new "difficulties" hidden in the Prime which my program on the mobile and on the pc don't have, but as the Prime was too expensive to be kept in the drawer..., and somehow I like it. Arno 

07172015, 08:35 PM
Post: #6




RE: Trigonometric Functions, Degrees and cas
Hi Marcel,
I think I figured it out. Typing convert in lower case works in cas: convert(1_(deg),1_(rad)) Using the sto soft button works in cas: 1_(deg)▶_(rad) but don't type a number before _rad. Using the builtin menu item shift/units/tools/CONVERT or typing CONVERT (upper case) in CAS doesn't work but does work in home and rpn. 

07172015, 08:39 PM
Post: #7




RE: Trigonometric Functions, Degrees and cas
Hi Arno,
The prime is an awesome machine. Software bugs are to be expected. They'll work them out eventually. Road 

07172015, 10:10 PM
Post: #8




RE: Trigonometric Functions, Degrees and cas
Hi!
Sorry, I used the CONVERT (upper case) in CAS mode and not the convert (lower case) ! In fact, to be an expert with the Prime, we have to use it a lot! I do a lot of programming (Astro Lab) for the past two months ... now I will return to the basic! Marcel 

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