9 replies to this topic

[afshin_electronic]

every time I transform a polar form to it's complex number, CP OS3.01 gives the wrong answer as you can see:

with this setting in "basic format":
-Decimal calculation
-Complex format
-Angel: Degree

I wrote this in OS 2.20:



in OS 3.01 :
(I made the screenshot in photoshop )



as you can see OS 3.01 cannot transform a polar number to it's complex number corectly!!! but OS 2.2 does it corect!!
even my fx-991ms does such things corect!!!! & faster than CP!!!!
such transformations is vital for my course in university!!! what shall I do???!!!

in ather "basic format" settings , it gives the wrong answer as well!!!!

I'm board with CP!! it's full of bugs and misscalculations and too slow and weak!!!! I think I have to buy a TI-89 Titanium!!!!
I realy wasted my money and time on Cp!!!

[The_AFX_Master]

First, don't abuse of emoticons
Second.. a 89 isn't faster than a CP

And third.. I will check how to help you

EDIT:

I see, is a weird error on the first line, but the CompToPol command works well.. That doesn't work is the polar to rectangular transformation. I recommend you to do such calculations using the ''<'' on the mth>optn of the virtual keyboard:

If you tipe the vector: [17 <(65)], then you get [7.18... 15.40....] as the OS 2.2 (and the correct answer) is, to revert, use the vector command ToPol() (vector menu)
Hope that helps

EDIT 2:

There isn't a bug.. you're the bug..

You need to set the calc in radians and use the grade symbol (as you used on the previous screenshots).. The problem is that the calc takes the values by default on radians regardless of the mode that you have set. could be a bug.. but the manual could have an answer to this. If the manual have an answer.. i gonna blame you because all the propaganda that you deployed unnecessary

[Lovecasio]

but the manual could have an answer to this.

I cannot find the answer in the user manual.
This problem has to be fixed.

[afshin_electronic]

There isn't a bug.. you're the bug..

You need to set the calc in radians and use the grade symbol (as you used on the previous screenshots).. The problem is that the calc takes the values by default on radians regardless of the mode that you have set.

you're right.. but it's as you say only in os3.01 and it's a bug anyway!!
in OS 2.20 we have:
in degree mode:


in radian mode:


as you can see in the screenshots above, the default is radian .. so that every value you enter, the os transforms it into radian and then does the calculation!!!
and in os 2.20 it transforms it into radian corectly!!
as a result it gives the correct answer in both degree & radian mode!!

but here in os3.01 we have:
in degree mode:


in radian mode:


as you can see.. it only does the correct calculation in radian mode..... but in degree mode it makes 65 degrees equal to 66 radians which is wrong and very serious!!!


all of my calculations have to be in degree mode and I cannot switch between degree and radian mode in the middle of my calculations!!!

as you see it is a bug!! and a very great and serious bug which has to be fixed!!!

could be a bug.. but the manual could have an answer to this. If the manual have an answer.. i gonna blame you because all the propaganda that you deployed unnecessary

the manual have no answer to this!!! this is a calculator and have to be able to calculate in both degree and radian mode!!!
if I'm wrong .. so why does OS 2.2 gives the correct answer while OS 3.01 gives the wrong answer!!!

this problem has to be fixed by casio!!!

anyway .. I defined a function for my polar calculation " define PH(x)=cos(x)+i*sin(x) " .. which helps me to go through this bug!!! and it's working for now!!!!!!

& sorry about the first post!! I was really angry with CP & I wrote like that

[The_AFX_Master]

dude, tapping over the DEG on statusbar, changes modes fast.. OS 2.2 doesn't have that

[Serj]

I haven't done the OS 3 upgrade yet as i only bought my CP a few days ago.. but this is in deed quite serious as in my course we have to use radians sometimes and degrees in other. But from what i understand calculations in radians are done correctly right? Is there only a problem if we use the exponential? Or are all calculations with degrees messed up?

[Colombia]

This bug is only on OS 3.01. I have OS 3.0 and everything work very well even the complex number.

[vanhoa]

3.02???????

[afshin_electronic]

Works in fine 3.02

are you OK???????

there is no OS 3.02!!!

I checked it with casio Website!!! https://edu.casio.com/

PS : take e look at https://edu.casio.com/ it has totaly changed & they have added a new forum too!!!