TI-36X Pro vs CASIO fx-991EX - Notable Differences

I wanted to make a video that demonstrates:
(1) 4 things I like about the TI-36X Pro that are somewhat lacking on the CASIO fx-991EX
and
(2) 4 things I like about the CASIO fx-991EX that are somewhat lacking on the TI-36X Pro

EDIT -- at 2:44 I state that you have to store the result into A (after you have re-run the calculation). That is incorrect. You could, instead, simply use ANS if you have just re-run the calculation that produces the value you want to use in a subsequent expression. Regardless, the TI's approach eliminates the gymnastics and is much more intuitive in this regard.

As one or two astute viewers pointed out in the comments (kudos!):
Regarding the Casio fx-991EX, when finding roots of a cubic function, a root with multiplicity greater than 1 will always be listed last (in other words, any single root will be listed before any double root when finding roots of a function -- so for x^3-7x^2+16x-12, the calculator will provide x=3 before it provides the double root x=2).

[bradryan]

One aspect that you neglected to mention is the SPEED of the processor in the calculators. In my enriched calculus classes I often have the students do SIGMA calculations and actually have them develop formulas using SIGMA for Trapezoid and Simpson's Methods. The Casio absolutely smokes the TI in processing speed to get to the final answers. The same is true for definite integrals that we often calculate that are not easy to work out by exact methods. Not essential, but quite helpful in theses situations.

[silverhusky]

I'm someone who's done his entire schooling in a country without Texas Instrument calculators. Hearing about the TI84 online, when I went calculator shopping I came across these two calculators I was torn on what to get. I've used a casio fx-991es plus my entire highschool education, but really wanted to try a TI.

Watching this video made me realise the difference is soo minor that it'd be better to just stick with the Casio that I'm already familiar with. Thanks for making this comparison!

[MatthewPattman]

With the updated TI-30X Pro MathPrint (2018 replacement for TI-36X Pro), the Quadratic roots are now exact like the Casio and can be converted to decimal. (Same for polar-> rect)

[Moshody]

In astronomy class, Casio 991-EX is much easier to calculate degree, min, sec than TI-36X pro. It use same button and symbol to represent deg, min, sec and same button to convert decimal to deg, min, sec form.
Whlie Ti-36X pro has this function in math menu which much harder to reach. Morever, it seperate symbol for dec, min, sec and we have to write untill sec unit even if it have no value in sec unit otherwise it will show an error, while Casio can write just until min if it has no sec.

[MrMarcec]

I made a comment but I erased it.
The new TI- 30X Pro mathprint (EU name) does not have the annoying points you talk about at min 10 and 13. It gives the compact result and pressing the <> button converts to decimal.
In my opinion, the opinion of a bad-at-math high school student, the 2 big lacks of TI are the less updated Vector menu (no Angle and no vector unit auto solver, to check formulas) and the lack of Inequalities menu. I would add also the 4th grade but it is probably more a "high class" optional than a regular useful tool. And then there are graphic calculator for a reason, I guess.
On the contrary, I have always had Casio, but 2 weeks ago I bought my first ti and it is SO intuitive and easy to use. You don't have to remember procedures and buttons. And you don't have to constantly looking at it preventing from turning off. I don't know... but using the TI is really a pleasure.... probably you should buy both and use the other one for the missing menu (or sub-menu) 😅

[khoilucas]

Have you used the calc button in casio?.It is very helpful for you if you use in order to apply the difference value into the function. Also you can solve the differences kind of equations (not only poly) when you press shift+ calc.

[Native_love]

The new Casio has a barcode feature that displays the graph on a cellphone or computer! That's why I like it and the ability to show the solution in a way that most of us write it out.

[chefarjunaidi]

Nice video. Both calculators are allowed in the PE exams (correct me if I'm wrong), I have the TI and I like the continuous memory feature.

[nats]

Knowing that, I bought both! Problem solved.

[killaken]

polysolve gives the answer in vertex form on the final page. so if you need the quadratic formula form you can solve for x and get that fractional form. It's not ideal but it is possible at least for that example you used.

[mattagajanian]

Hi. Why not use deflation to find multiple and double roots? Yes, I know. The 991EX should do this automatically and you should be familiar with the equation beforehand so that you know it has double roots.

A quick illustration of deflation.

Find the first root of f(x). This is a.
Next, find the root of f(x)/a. That’s the second root, b.

Next, the third root is c by solving f(x)/[(x-a)(x-b)].

and so forth.

[GeekingWithKudabeybe]

thank you for this informative video. was struggling between the two since they were on sale on amazon.

the tie breaker for me was the ability to retain memory! i didnt even realize the casio wouldnt have such an obvious feature!!

i have been using a calculator app i found on the playstore on my phone and it is serving me well enough. but i had a little mishap in the workshop and in the process my phone got bumped off the table. it survived (thankfully without any cracks!) but i made the decision to get a calculator to keep on the table instead of the phone.

and yes without even realizing it the memory feature is something i use ALOT. i keep going back to measurements to double check or make a change and the app just does a good job of it.


i know i would have felt duped after getting the casio for my use case hehehe.

[GeoCalifornian]

4:33 That is a very big deal! --when, after powering back on, you've lost the long solver equation that you were explaining to your niece, and you must key-in the entire solver expression again. FAIL.

Casio has always destroyed your calculation history—when TI (and HP) have always preserved your calculation history on their scientific calculators.
/And so it goes...

[gate]

No other manufacturer does stack better than Texas Instruments. The stack memory on the Nspire is unbelievably advanced!

[bithikatube]

Very nice video. Helped me to choose between the two.

[lesonyrra]

Very helpful, and a good structure for comparison(s), I think.

[Savioaryt]

the video that i was looking for, thank you.

[KingEDZKY]

Does the TI-36X Pro have a system solver for linear equations with 4 unknowns?

[ianmaw]

It would be interesting to see what you think of the new Casio FX-800 DE calculator (it is in German though :) ).

[NPPDEngineer]

What about binary math, 2's complement, 1's complement, binary coded hexadecimal conversions and computer engineering functions with mantissa and exponent?