Casio FX9750GII Graphic Calculator - Page 5 - Answered Questions & Fixed issues

First you must setup the correct angle unit (as required by the problem you are solving).

1. Open the [Run] application screen.
2. Press [SHIFT][MODE] to enter (SetUp)
3. Use down arrow key repeatedly until you see the line Angle:
4. Press the F1 key to select Degree as angle unit. or F2 for Radian.
5. Quit the setup configuration screen to return to the main Calculator screen (RUN/MAT).
   

Once the angle unit is correctly set,

1. Press the function keys [SIN], [COS], [TAN]
2. Depending on what function you pressed, the command sin( or cos( or tan( is displayed.
3. Type in the angle value,
   
4. close the right parenthesis and
   
5. press [EXE]

A result should be displayed.

Here is an example for a third degree polynomial. (Screen captures are from an FX9860 G SD, so there may be some differences in screen appearance, but the procedure is the same.)
Press the [MENU] key and select [EQN]


Select the type of equation to solve. Press [F2:Poly] for a polynomial.

Choose the degree of the polynomial. For a 3rd-degree press F2



Enter the coefficients in the template



and press [F1:SOLV]



Here is the solution for the case I took.



Press [F1:REPT] if you want to enter the coefficients of another polynomial.

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 of menus.

For factorials

• Press then [F3](PROB) then [F1] (x!) followed by [EXE].

For combinations

• Press then [F3](PROB) then[F3][nCr][EXE]

For permutations

• Press then [F3](PROB) then[F2][nPr][EXE]

In Run/Mat> screen press [OPTN], then [F4:CALC], then [F6:>], and finally [F4:logab]
The command logab( is displayed on the screen.
Enter the base then a comma then the number whose logarithm you are looking for. Close the parentheses and press [EXE]
Example: logab(3,81)=4

By definition, a fraction is a number that is represented by the ratio of two integers (whole numbers). However, any value in radians is bound to be approximate because the radian unit is intrinsically linked to the value of pi. Ans as you well know, pi is an irrational number: a real number that cannot be represented by a fraction. Does it make sense to try to cast it into a form that it cannot have?

However, if you truncate an irrational number and keep only a limited number of digits in its decimal representation, then that approximate representation can of course be represented by a fraction. To effect that conversion, press the [FD] key to the right of the [a b/c] key.

If the number of display symbols to represent the fraction exceeds the limits of the screen then the calculator will ignore the command. It will not comply, because it cannot comply.
Some decimal representations already displayed as results can be converted, other cannot be.

Not all decimal representations have equivalent fractions. Take pi. Its approximate value as given by the Casio FX9750II is 3.141592654. This is just an approximation because the string of decimal digits in pi has no end. It continues . Such a number that cannot be represented by a ratio of two integers is not rational, not a fraction. It is called irrational.Other such numbers are ?2, ?3,?5, e the base of natural logarithms.
As a matter of principle, if a number is called irrational, it is because it is not rational (not a fraction), and it makes no sense to try to cast it into fraction form.

However, if you truncate an irrational number so as to keep only a finite number of decimal digits, then that truncated number can be represented by a fraction, but qualitatively speaking, it is not the original irrational number.
Thus if you decide to use 3.141500000000000000....0 as an approximate value of pi then you write
3.1415=31415/10000 and the calculator will convert it to the mixed fraction 3u283u2000. To effect this conversion, you press the [FD] key to the right of [a b/c]. If you want an improper fraction 6283u2000 you press [SHIFT][[FD].

As to the value of sin 45 you quote, you should be aware that it is valid for an angle unit in radians.
It is an approximation because the radian unit is based on the value of pi, which, as I said above, is an irrational number.
If you use the degree angle unit, sin45 deg is actually equal to 1/?2 or ?2/2 and this is clearly irrational, and it cannot be represented as a fraction. In conclusion it makes no sense to try to cast it into such form.
On the other hand, sin 30 deg or cos 60 deg are both exactly equal to 1/2. The calculator will convert them to a fraction.

On a more general note, the calculator will always be able to convert a fraction into an approximate decimal number, but the converse may not be possible. It depends on the number of display space available on the screen.

Here is a small sample of things you can do with matrices.

A. Define a matrix (Create it)

1. Turn calculator ON.
   
2. Press Menu,select the MAT icon and press [EXE]
3. You see a list of possible matrix labels (A, B, C,D,E,F)
4. All that have not been created have a "none" to their right
5. Highlight a matrix name and press the right arrow. Where there was "none" , you have a template 0x0.
6. That is where you specify the dimensions (mxn). example. 2x2
7. Enter the first dimension and press [EXE]
8. Enter the 2nd dimension and press [EXE]
9. A matrix template opens where you enter the coefficients left to right and up down.
10. After each coefficient press [EXE]. Cursor moves to the next coefficient, etc.

At the bottom of the screen you have 3 menus for Row and column manipulations. But those will have to wait for now.
Press [SHIFT][QUIT] to return to the list of matrices to create new ones

B Operations on matrices
Once you have one matrix, you can do operations on it: Calculate the determinant (if matrix is square), calculate its inverse, transpose, augment it, fill it, etc..

1. These operations are accessed as follows.
2. Quit the matrix editor by pressing [Menu] and selecting the [Run] application.
   
3. Press [OPTN][F2:MAT]
4. You have the menus Mat,M(atrix)->L(ist), Det(erminant), Trn (transpose), Aug(ment) ->, Iden(tity),Dim(ension) Fill

Example : calculate the determinant of a matrix A (already defined).

1. You press the [OPTN][F2:MAT] key sequence (just above)
2. Press [F3:Det]; the command det is displayed on screen.
3. Press [F1:Mat] the identifier Mat is displayed.
4. Press [ALPHA] A; screen display det Mat A.
5. Press [EXE] to get the value of the determinant.

C. Square of Matrix A
[OPTN][F2:MAT] (MAT) [Alpha] A ^2 [EXE]

D. Product of two compatible matrices MatAXMatB
[OPTN][F2:MAT] (MAT) [Alpha] A [*] (MAT) [ALPHA] B [EXE]



Press the F6 key to access other functions.

Press the MENU key
Select 5:Graph and press EXE
In the Y= editor window, press F3:TYPE
Press F6 to access other graph types.
Select the inequality symbol you want and enter the right member of the inequality, then press EXE.
You are returned to the Y= screen.
When done entering your expressions to graph, press F6 Draw.

You are considering buying bonds in ACBB, Inc. The bonds have a par value of $1,000 and
mature in 37 years. The annual coupon rate is 10.0% and the coupon payments are annual. If
you believe that the appropriate discount rate for the bonds is 13.0%, what is the value of the
bonds to you? (Hint: Bond value - annual pmts)

Press SHIFT [SETUP] to bring up the setup screen. Move down to the "Angle" line, then select the desired angle mode. Press EXIT to exit the setup screen.

tHIS TELLS YOU EXACTLY HOW TO DO IT http://support.casio.com/manualfile.php?rgn=5&cid=004002013

I am afraid that "find the solution of a matrix" does not mean anything. However if you want to perform some arithmetic operations on the matrices ( multiplication, addition, subtraction) you can do so using the regular operation keys.
If on the other hand you want to calculate determinants of square matrices, inverse square matrices etc.
Go to the RUN/MAT screen and press [OPTN, then press F2 to open access these operations and this is what you see.

F1 type the MAT identifier in command line
M>L converts a matrix to a list
Det calculates the Determinant of a square matrix
Trn transposes the matrix,
etc.
To invert a square matix, use the [X^-1] key e.g. MatA^-1

Open the [Run] application screen.
Press [SHIFT][MODE] to enter (SetUp)
Use down arrow key repeatedly un til you see the line Angle:
Press the F1 key to select Degree as angle unit.

If it is possible, you convert a displayed decimal result to a fraction by pressing the key marked [F-D]. It is to the right of the [a b/c] key.

The Matrix application share the same icon as the RUN. When you select the RUN/MAT icon you see a possibly blank screen at the bottom of which there is a TAB called >MAT. Press F1 and all available matrix tools will appear.

Unlike traditional calculators, the FX9750G uses textbook order to call functions. For example, to calculate the sine of 45°, you key in (angle argument unit set to degrees assumed):

[sin] 45 [EXE]

Cosine and tangent are analogous. Argument format can be degrees, radians or grad. You can set up the angle argument unit by keying in:

[SHIFT] [SETUP] [v] [v] [v] [v] and then

• [F1] (Deg) [EXIT] for degrees (1 full circle = 360°),
• [F2] (Rad) [EXIT] for radians (1 full circle = 2pi),
• [F3] (Grad) [EXIT] for grad (1 full circle = 400 gon).
  

Hey it is. Okay, so start with a equation: say, y = -(1 |x|). Now type y = -(1 , then press the [OPTN] button, next to the shift. Next press the [NUM] button or F5. The first menu button should be Abs or absolute value. When your done it should look like this. y = -(1 Abs (x)) then graph it.

The way to do it is this; Divide the number by 2, get the integer quotient for the next iteration. Get the remainder for the binary digit, repeat the steps until the quotient is equal to 0.

It is because it is not set up correctly. For you to fix it, just press on the lower right button for few seconds till it displays " cas10" then let go of the button

Here is the Service Manual, but in normal instances, you would just buy another one, or return it to Casio for service.

Casio DR-120LB Service Manual

ManualsLib https://www.manualslib.com > ... > DR-120LB View and Download Casio DR-120LB service manual online. DR-120LB cash register pdf manual download. Also for: Dr-200l, Dr-210l, Dr-320b, Zx-517c, Zx-517a, ... ..