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Re: cos(pi/2) n'est pas égal à 0 (mode Home)

Hi mrgx_cmte, in "Home" mode the value of PI is approximated to 12 digits so, typing PI is like typing 3.14159265359. Since 3.14159265359 ain't like PI, cos(PI/2) is not exactly 0. The CAS works symbolically while HOME environment is numerical, they yield different results. Have a pleasant...
by Hisham
03 Nov 2019, 12:30
 
Forum: Problèmes divers / Aide débutants
Topic: cos(pi/2) n'est pas égal à 0 (mode Home)
Replies: 6
Views: 313

Re: Handheld TI-Nspire CX CAS !!!

Mesdames et Messieurs,
faites votre prix, s'il vous plait ;)

P.S. Sans precipitation :D
by Hisham
03 Oct 2019, 11:18
 
Forum: Occasions
Topic: Handheld TI-Nspire CX CAS !!!
Replies: 4
Views: 422

Re: Handheld TI-Nspire CX CAS !!!

Never mind, that's okay, I find the calc is perfectly fine as it is.
Thanks for the feedback and best,

Hisham ;)
by Hisham
18 Sep 2019, 15:57
 
Forum: Occasions
Topic: Handheld TI-Nspire CX CAS !!!
Replies: 4
Views: 422

Handheld TI-Nspire CX CAS !!!

Hello everyone, I'm willing to sell this fantastic TI-Nspire CX CAS in perfect working order, complete with all (USB cable, etc.). The purchase invoice is included. The firmware of the calculator is updated to its latest version (4.5.1 - 17/04/2019). I sell it for 100€, shipping included (advance pa...
by Hisham
14 Sep 2019, 07:46
 
Forum: Occasions
Topic: Handheld TI-Nspire CX CAS !!!
Replies: 4
Views: 422

Re: Problem with csolve

1+0.8x=0, multiplying both sides by 10 we get 10+8x=0 ;)
Now 8x=-10 and finally x=-5/4 :)
As Critor rightly said, there are no complex roots for given equation.
Best,

Hisham ;)
by Hisham
05 Sep 2019, 07:26
 
Forum: Problèmes divers / Aide débutants
Topic: Problem with csolve
Replies: 5
Views: 234

Re: Pourquoi remplacer sa TI-Nspire CX CAS ?

Bonjour, J'aimerais avoir votre avis. Quelle serait la raison (ou les raisons) de remplacer une TI-Nspire CX CAS par la nouvelle TI-Nspire CX II-T CAS ? J'ai vu graphiques dans le basic, et légère augmentation de la vitesse. Si j'ai bien lu. Mais ce n'est probablement pas tout. L'inconvénient est c...
by Hisham
25 Aug 2019, 12:31
 
Forum: Problèmes divers / Aide débutants
Topic: Pourquoi remplacer sa TI-Nspire CX CAS ?
Replies: 2
Views: 217

Re: coefficient de température α

You're welcome, mate ;)
by Hisham
17 Aug 2019, 09:45
 
Forum: Problèmes divers / Aide débutants
Topic: coefficient de température α
Replies: 5
Views: 595

Re: coefficient de température α

What is the temperature coefficient (Alpha) of Ni ?
Given Alpha=2.7*10^(-4) °C^(-1), we have R(T final)=115 Ohm, from which R0=115/(1+2.7*10^(-4)*55)=113.3 Ohm.
So we will have 2*(113.3+Rs)=230 (Rs is the series resistance), from which Rs=1.7 Ohm.
Happy August holidays,

Hisham ;)
by Hisham
15 Aug 2019, 16:33
 
Forum: Problèmes divers / Aide débutants
Topic: coefficient de température α
Replies: 5
Views: 595

Re: TI Nspire CX CAS VS CX II-T CAS

It's a pleasure ;)
Have a nice week-end !
Best,

Hisham :)
by Hisham
10 Aug 2019, 11:45
 
Forum: Actualités
Topic: TI Nspire CX CAS VS CX II-T CAS
Replies: 13
Views: 1715
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