Casio FX-9750GPlus Calculator - Answered Questions & Fixed issues

There is no button but a menu tab.
In Run screen, enter the number whose factorial you want to calculate ( number can be at most equal to 69), press [OPTN][F6] to get to next page pf menus. Press then [F3](PROB) then [F1] (x!) followed by [EXE].

Is it possible to change d/dx into d/dy on a Casio fx-9750GII? If so, how?

See image below

Hello,
You are not using the correct syntax of the exponential function.
[SHIFT][e^x] ( number) .
[SHIFT][e^x] 1 EXE] gives 2.718281828
[SHIFT][e^x] [(-)] 3 gives 0.04978706837 . The (-) is the change sign to the left of the [EXE] key.

For simple arguments the parentheses are not necessay, but it is safer to use them to avoid ambiguities and erroneous results.
Hope it helps.

One not way would be to define a 4x4 matrix Mat A to hold the coefficients of the linear system. Then define a 4x1 column vector Mat V to hold the constants on the right.
Define a third 4x4 matrix Mat B you may leave filled with 0.
On command line, in Run Mat screen enter (Mat A) ^(-1) and store it in the zero-filled matrix Mat B. this is the inverse of Mat A.
If the inverse of Mat A exists, and it does in this case, the solution of the system is obtained as the column vector, resulting from the multiplication of Mat B by column vector Mat V

You can even shorten the procedure by just calculating ((Mat A)^-1)X (Mat V) [EXE]

To summarize

1. Create 4x4 Mat A and type in the coefficients of the linear system.
2. Create a 4x1 column vector Mat V for the right-hand sides
3. Obtain you solution vector as ((Mat A)^-1)X (Mat V) [EXE]

To get the Mat identifier on command line,

• use catalog or
• in RunMat screen, press [OPTN] followed by [F2:Mat], then [F1:Mat].
• At this point the identifier is on command line, and you have to press [ALPHA] [X,Theta, T] to enter letter A.
• You use a similar key sequence to enter Mat V
  

To calculate the inverse of the matrix just use the [SHIFT][)] key sequence which is (X^-1)
Multiplication operator is the regular [times] key.

Download and read user's manual:http://support.casio.com/manualfile.php?rgn=5&cid=004002004

Select the correspondent function key. Whch one? Look up in your user's manual. don't have one?Some has basic instructions printed on lid. Look for manual on web searching with google for Manual Casio model

0.5842

Sorry, the question is not clear. No such abbreviation. DMS?

Press Menu key, then Graph. Press the F3:Type tab. If you do not see the inequality symbols press F6 to go to the next page.

Turn calculatorOn. Press the Menu button. Press 1 for Run screen Press OPTN Press F6> Press F3:PROB Enter the number whose factorial you wan, then press F1:x!Note that the number must be less than 70. For combinations and permutations, use F3:nCr, or F2:nPr

Press OPTN, select "PROB" then select "x!"

You must be in the RUN screen. Press Menu Press 1:Run Press OPTN Under tab F2:Mat you get the MAT tab. To invert a non-singular matrix A (a matrix with non-zero determinant) you, on the command line type in Mat A then press the [x^-1] key. The [x^-1] is the shifted function of the right parenthesis.

To calculate the arc length of a curve you need the derivatives as functions of a variable not the derivatives at one point. If I were you I would read the manual for more complete information. Maybe if you wrote a program that does that.

In Run>Mat press the OPTN key, Then F6:> to move to the next page of options. You will see the ANGL tab as on the screen capture (above F5 key. Press F5. You will see what follows. Type in 50, press the F4 key, 25 then F4, 23 then F4. Press EXE. you get the result in decimal degrees as on the screen capture. To convert from DMS to D.D, or from D.D to DMS, vice-versa, press the F5 key

In Run>Mat press the OPTN key, Then F6:> to move to the next page of options. You will see the ANGL tab as on the screen capture (above F5 key. Press F5. You will see what follows. Type in 50, press the F4 key, 25 then F4, 23 then F4. Press EXE. you get the result in decimal degrees as on the screen capture. To convert from DMS to D.D, or from D.D to DMS, vice-versa, press the F5 key

Checking the batteries is the first thing one should try. It is possible that for some reason the screen may be too dim. Reset the calculator by pressing the button on the back. The screen should show the menus. To adjust the contrast you must press the E key (no need to press the ALPHA key for that.) then press F1 to access the contrast setting feature. Press the Right pointing arrow to increase the contrast.

I believe you must rethink the design of your program If you have several inputs that lead to a single result you want to keep for further calculations, enter the inputs, calculate your result and store in a variable. The intermediate variables can be set to zero (by precaution) and reused. Use functions, and subroutines. Usually, in well designed programs, the scope of a variable defined inside a function or subroutine is local :It can't collide with the same name used globally (global scope). If a variable is no longer needed destroy it and reuse it.

x^2 squares the value (multiplies by itself), x^-1 inverts it (divides it into one), x! calculates the factorial, and square root calculates the square root.

To draw graphs.

1. Turn calculator ON (isn't that obvious?)
2. If you see no icons, press [MENU]
3. Use arrow to move focus on GRAPH and press [EXE]
4. By default, the graph type is Y=
5. Enter your equation on line Y1=, use the [X,theta,T] key to enter the X-variable
6. Press [EXE] when finished entering a function.
7. Enter other functions if you want.
8. When done, press [F6:Draw].
9. If you do not see a big portion of the curve you can press [SHIFT] [F2:Zoom] and select [F5:Auto]

I am enclosing screen captures. The screens you see may not look exactly as on the FX-9750G, but all menu commands you have to execute are accessed by the same key sequences.






This last one is obtained with the Zoom: Auto