Calculating & Solving Functions On A Casio fx-991CW Classwiz Calculator | f(x) g(x)

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⨸ Aʙᴏᴜᴛ Tʜɪs Vɪᴅᴇᴏ ⨸
This video explores the function feature on the Casio fx-991CW Classwiz calculator. We look at how we can calculate using given values of x, including composite functions. We also use the Solver, with the same functions to solve for values of x.
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𝘍𝘰𝘳 𝘷𝘪𝘥𝘦𝘰𝘴 𝘤𝘰𝘯𝘤𝘦𝘳𝘯𝘪𝘯𝘨 𝘢 𝘊𝘢𝘴𝘪𝘰 𝘊𝘢𝘭𝘤𝘶𝘭𝘢𝘵𝘰𝘳, 𝘊𝘢𝘭𝘤𝘶𝘭𝘢𝘵𝘰𝘳 𝘚𝘺𝘮𝘣𝘰𝘭𝘴, 𝘔𝘰𝘥𝘦𝘴, 𝘐𝘮𝘢𝘨𝘦𝘴 & 𝘗𝘳𝘰𝘥𝘶𝘤𝘵 𝘕𝘢𝘮𝘦𝘴. 𝘢𝘳𝘦 𝘊𝘰𝘱𝘺𝘳𝘪𝘨𝘩𝘵© 𝘊𝘢𝘴𝘪𝘰 𝘊𝘰𝘮𝘱𝘶𝘵𝘦𝘳 𝘊𝘰. 𝘓𝘵𝘥 . 𝘊𝘢𝘭𝘤𝘶𝘭𝘢𝘵𝘰𝘳𝘴 𝘧𝘳𝘰𝘮 𝘰𝘵𝘩𝘦𝘳 𝘤𝘰𝘮𝘱𝘢𝘯𝘪𝘦𝘴 𝘮𝘢𝘺 𝘴𝘰𝘮𝘦𝘵𝘪𝘮𝘦𝘴 𝘧𝘦𝘢𝘵𝘶𝘳𝘦, 𝘪𝘯𝘤𝘭𝘶𝘥𝘪𝘯𝘨 𝘛𝘦𝘹𝘢𝘴 𝘐𝘯𝘴𝘵𝘳𝘶𝘮𝘦𝘯𝘵𝘴, 𝘕𝘶𝘮𝘸𝘰𝘳𝘬𝘴 & 𝘚𝘩𝘢𝘳𝘱. 𝘛𝘩𝘦𝘊𝘢𝘭𝘤𝘶𝘭𝘢𝘵𝘰𝘳𝘎𝘶𝘪𝘥𝘦.𝘊𝘰𝘮 𝘦𝘢𝘳𝘯𝘴 𝘮𝘰𝘯𝘦𝘺 𝘧𝘳𝘰𝘮 𝘥𝘪𝘴𝘱𝘭𝘢𝘺 𝘢𝘥𝘴 & 𝘢𝘧𝘧𝘪𝘭𝘪𝘢𝘵𝘦 𝘭𝘪𝘯𝘬𝘴. 𝘓𝘪𝘯𝘬𝘴 𝘛𝘰 𝘗𝘳𝘰𝘥𝘶𝘤𝘵𝘴 & 𝘛𝘩𝘪𝘳𝘥 𝘗𝘢𝘳𝘵𝘺 𝘞𝘦𝘣𝘴𝘪𝘵𝘦𝘴 𝘴𝘶𝘤𝘩 𝘢𝘴 𝘈𝘮𝘢𝘻𝘰𝘯 𝘢𝘯𝘥 𝘰𝘵𝘩𝘦𝘳 𝘳𝘦𝘵𝘢𝘪𝘭𝘦𝘳𝘴 𝘢𝘳𝘦 𝘢𝘧𝘧𝘪𝘭𝘪𝘢𝘵𝘦 𝘭𝘪𝘯𝘬𝘴. 𝘐𝘧 𝘺𝘰𝘶 𝘤𝘭𝘪𝘤𝘬 𝘰𝘯 𝘵𝘩𝘦𝘴𝘦 & 𝘣𝘶𝘺 𝘢 𝘱𝘳𝘰𝘥𝘶𝘤𝘵 𝘵𝘩𝘦𝘯 𝘛𝘩𝘦𝘊𝘢𝘭𝘤𝘶𝘭𝘢𝘵𝘰𝘳𝘎𝘶𝘪𝘥𝘦.𝘊𝘰𝘮 𝘳𝘦𝘤𝘦𝘪𝘷𝘦𝘴 𝘢 𝘴𝘮𝘢𝘭𝘭 𝘤𝘰𝘮𝘮𝘪𝘴𝘴𝘪𝘰𝘯 𝘢𝘵 𝘯𝘰 𝘦𝘹𝘵𝘳𝘢 𝘤𝘰𝘴𝘵 𝘵𝘰 𝘺𝘰𝘶. 𝘛𝘩𝘪𝘴 𝘩𝘦𝘭𝘱𝘴 𝘴𝘶𝘱𝘱𝘰𝘳𝘵 𝘵𝘩𝘦 𝘤𝘩𝘢𝘯𝘯𝘦𝘭 & 𝘢𝘭𝘭𝘰𝘸𝘴 𝘮𝘦 𝘵𝘰 𝘤𝘰𝘯𝘵𝘪𝘯𝘶𝘦 𝘵𝘰 𝘮𝘢𝘬𝘦 𝘷𝘪𝘥𝘦𝘰𝘴.

[@ijabbott63]

That's a neat trick for solving with the inverse function!

[@hjj968]

Thank you sir❤

[@sah5184]

How do i change the language on this version of the calculator?

[@engineeringstuffs]

The Casio fx 991 cw now consistently returns the answer in decimal format rather than the standard mathematical notation, which was the practice in previous models. For example, when integrating cos(x)^2 from pi to 5pi, it provides the result as 6.28318530718 instead of the simpler and more understandable 2π. Converting 6.28318530718 to 2π isn't straightforward unless you assume it's a multiple of π Please correct me if i am wrong.

[@Slicudis]

Hello! Could you teach us how to calculate LCM on a Cifra sc-820 calculator, please?

[@TheCalculatorGuide]

There doesn’t appear to be an LCM facility on that calculator.

[@Redditard]

I have checked the PDF Manual provided by Casio and have tried myself, there seems to be no inverse function support fro fx gx at all.

[@TheCalculatorGuide]

I looked as well and I agree.

[@mohammedsiddiqromazan1075]

Hey is there way to store functions for example A+B and A-B² and call them when ever I want and substitute the values, how do I do it

[@TheCalculatorGuide]

No not to store the actual function as that is essentially storing an algebraic expression which is not allowed in most exams.

[@saujanyapoudel8910]

I can see what you are trying to do there, create a shortcut for an expression and use it when needed, it is not quite available on the casio models. You can type in A+B or something like that usimg the alpha key and hit the calc button after which you can input value for each variable and the calculator will return the value of the expression. However, the formula is gone when you clear the screen and there's no way to store it in the memory

[@jeeva1]

How to store equation with more variables in this calculator, x²+3y+z , how to store this equation and substitute value

[@TheCalculatorGuide]

You need to define f(x) in Function although this tends to just be a function of x.

[@bd29329]

Hello, I've a question. Is casio 570ex and 991ex works the same?

[@TheCalculatorGuide]

The only difference is the battery I think.

[@blu_ee]

Hello, getting a new calculator for my exams. Is the FX-991CW the best one for the functions ? - looked through a couple of your videos and saw functions like finding LCM/HCF, unit conversions, solving linear equations, prime etc. maybe the FX-991EX is better suited? Would love to hear feedback thanks :)

[@frightfrightfright]

fx991cw is just a newer version of the 991ex

[@saujanyapoudel8910]

Though the cw has new functions added to it, the Casio 991 ex can do pretty much everything the 991 cw does since the cw is just an upgrade to the ex. Therefore I think these two models don't differ that much in terms of functions and it wouldn't matter which one you get. If you already own a 991 ex getting the cw isn't really worth it for you.

[@irishchocolate3872]

Your fx-991CW seems to be a little more capable than our version here in the U.S. My calculator doesn’t seem to be able to do the last example.

[@TheCalculatorGuide]

Not all CW models have the solver unfortunately.

[@irishchocolate3872]

@@TheCalculatorGuide Mine has the solver. However, if I try to follow your example, my calculator seems to fall short. Same situation with TI. I bought a TI-30 MathPrint PRO from Great Britain. Here in the U.S. we have the TI-36XPRO. The TI from Great Britain is definitely a better machine. I don’t know why Casio and TI do that.

[@TheCalculatorGuide]

@@irishchocolate3872 Strange

[@Kanna.....]

Hello, is fx-83GT CW able to solve equations?

[@TheCalculatorGuide]

No the solver is only available on the fx-991CW models

[@Ehab.Ramadan]

I need 991cw simulator on windows

[@IftekharRifat-lm2gr]

I am your regular viewer from Bangladesh 😊. Please make a playlist of Casio 991 CW for college students included ( Physics, chemistry, Higher Mathematics )

[@TheCalculatorGuide]

I am putting together a general fx-991CW playlist. Hopefully here will be lots relevant for you

[@IftekharRifat-lm2gr]

@@TheCalculatorGuide thank you sir 😃😃😃

[@rudronile51]

Can you give the cw software please? 🥹

[@TheCalculatorGuide]

It is available via Casio classpad. You need to buy a calculator to get an access code.

[@rudronile51]

@@TheCalculatorGuide I have 4 physical cw/ex/ms/es plus calculators. what I have to do now?

[@TheCalculatorGuide]

When you buy a CW you should have a code that you can use when you sign in or create an account on Casio classpad. It should be included in the box/manual or at least it was with mine.