CASIO fxCG50

03022018, 10:08 PM
Post: #1




CASIO fxCG50
Calling Eddie Shore...I got the CASIO fxCG50. Nice unit. I noticed that in your blog, you were happy to see that it could deal with complex numbers, even with trigonometric functions. I am not having success with that...how do I get this to work?


03022018, 10:15 PM
Post: #2




RE: CASIO fxCG50
An example...sin (1+1i) produces a non real error, even if I, in setup, choose a+bi mode.
If I use sin 1+1i , it thinks I am adding sin 1 and i. 

03032018, 02:31 AM
(This post was last modified: 03032018 02:44 AM by sacredcow.)
Post: #3




RE: CASIO fxCG50
Have a look at chapter 235 in the FXCG50 software users guide. It describes what functions can be used with complex numbers.
Jon 

03032018, 06:16 AM
Post: #4




RE: CASIO fxCG50
Based on the blog I saw, I held out hope that the 50 had trig capabilities with complex numbers. After all, manuals sometimes do not get updated (or ignore capabilities...classwiz 991 U.S. Model manual gives no hint that d/dx and integrals are allowable in solve, for example). It is faster than the CG10.
Do you have any idea what OS 3.10 updated over the 3.0x variants? 

03032018, 09:25 AM
Post: #5




RE: CASIO fxCG50
You make a fair point about manuals not being updated. Casio seems to be particularly opaque when it comes to revealing OS update information.
Source: Cemetech.net https://www.cemetech.net/forum/viewtopic.php?t=14075 OS 3.10 features:  fxCG10 restrictions on g3p/g3b file import removed  fxCG10/20 will use white fxCG50 main menu screen  In exam mode, fxCG50 display brightness is set to level 1 instead of 0 (after inactivity, increased battery drain)  [EXP] / [x10^x] key will output "x10" instead of "E" where possible  Catalog includes QR code function to get help online for specific commands  ECON4 adds manual sampling function and can save sample data to CSV files  3D Graph addin adds cone template and function input (Z graph, parametric graph, solid of rotation on X/Y axis)  3D Graph addin adds trace function and can determine intersections and relationships among lines and planes  3D Graph addin version 1.01 will work on OS 3.10 or higher (3D Graph 1.00 even works on fxCG10 OS 1.00) fxCG20/50 AU restrictions:  Only 4.5 MB of user flash memory and Picture Plot addin not preinstalled  No intersections and relationships among lines and planes in 3D Graph addin 

03032018, 03:54 PM
Post: #6




RE: CASIO fxCG50
(03022018 10:08 PM)lrdheat Wrote: Calling Eddie Shore...I got the CASIO fxCG50. Nice unit. I noticed that in your blog, you were happy to see that it could deal with complex numbers, even with trigonometric functions. I am not having success with that...how do I get this to work? Unfortunately, trig functions of complex numbers no longer work. This probably a side result of the new OS (3.10.0212). I must have written my review before I upgraded the OS. I will note this in my review, thank you for catching this! Why Casio why? Trig functions with complex numbers will now have to use the work around (there are others): sin (a+bi) = sin a cosh b + i cos a sinh b cos (a +bi) = cos a cosh b  i sin a sinh b Thankfully the ln and e^x functions still can work with complex numbers. 

03032018, 04:29 PM
Post: #7




RE: CASIO fxCG50
That sure is odd...indeed, why...
My "50" came with OS 3.02, and the trig complex number operations were not available. Is the OS ROM at it's limit roomwise? 

03032018, 05:06 PM
Post: #8




RE: CASIO fxCG50
I don't know. Maybe it's to match with the other Casio calculators, the fx115 ES Plus, fx9860GII, and the fx991 Classwiz?


03042018, 09:14 PM
(This post was last modified: 03042018 09:15 PM by ijabbott.)
Post: #9




RE: CASIO fxCG50
(03032018 04:29 PM)lrdheat Wrote: My "50" came with OS 3.02, and the trig complex number operations were not available.Mine came with either OS 3.00 or 3.02  I don't remember which, and as far as I remember, never supported complex trig. Perhaps it was a particular regional variant that supported complex trig functions? They are not mentioned in the English manual for OS 3.00. 

03042018, 09:26 PM
Post: #10




RE: CASIO fxCG50
I'm wondering if Eddie tried something like sin 1+2i instead of sin (1+2i). The first case would be interpreted as (sin 1) + 2i. This would produce an answer that looks like complex numbers are supported, but is really sin 1 which is ~.84 plus i. Sin (1+2i) produces a non real error. The Prime produces in home, ~3.17+~1.96i.


03042018, 09:28 PM
Post: #11




RE: CASIO fxCG50
That is, the CASIO would produce ~.84+2i


03042018, 09:36 PM
(This post was last modified: 03042018 09:45 PM by ijabbott.)
Post: #12




RE: CASIO fxCG50
(03032018 05:06 PM)Eddie W. Shore Wrote: I don't know. Maybe it's to match with the other Casio calculators, the fx115 ES Plus, fx9860GII, and the fx991 Classwiz? The fx115 ES PLUS and fx991EX ClassWiz are even more limited in their support for complex numbers  four banger plus conjugates, absolute value, integer powers, extraction of real or imaginary part. No square roots (or other noninteger powers), logs, or exponentiation. (I don't know about the fx9860GII, but I suspect it has the same complex number support as the PRIZM series.) 

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