20 Most Recent Casio FX-9750GPlus Calculator - Page 7 Questions & Answers

To get results in radians you must configure the angle unit to be degree.

1. In Run screen press [SHIFT][MENU] to access (SETUP).
2. Use Down arrow to highlight the line Angle :
3. Press F2 key to select the TAB Radian.
4. Once you do that all values (input of trigonometric functions and polar graph functions OR output of inverse trigonometric functions) are in radians.

However I believe I sense a misconception in your request. You can press [SHIFT][x10^X] to enter PI, but the calculator will never give you an angle result as a fraction of PI. You will have the numerical approximation of it that corresponds to the number of decimal digits you are keeping.

The problem is not finding the sine of the angle but expressing the angle in Degree Minutes Seconds instead of decimal degrees.

1. In RUN screen press [SIN] function key
2. Press [OPTN]
3. Press [F6] to get to next page of menus.
4. Press [F5:Angl]
5. Enter 45 and press [F4: degree ' "]
6. Enter 20 and press [F4: degree ' "]
7. If you have seconds to enter, type in value and press [F4:degree ' "]
8. Press [EXE] to get your result.

This procedure will give you the sine regardless of the angle unit the calculator is configured for.

I am not aware that the Casio FX-9750GPlus has a LIMIT application. If it does I would like to know how to find it.
As to graphing, read what follows. Window questions is at the end.

I will show you how to draw a simple function such as y=5*X 2. The method is the same reagrdless of the complexity of the function.

1. Turn calculator ON. If you do not see several icons press [MENU].
2. Use arrow to select the [GRAPH] application and press [EXE].
3. In the entry screen, the line with Y1= is highlighted. If it is not, use arrow to highlight it.
4. Press the right arrow, the highlighting disappears leaving you with Y1= and the blinking cursor.
5. At the position of the cursor type 5 then press the [X, theta,T] key, under the [ALPHA]. On the screen appears 5X, complete your equation by typing [ ] 2
6. Press [EXE] to store function.
7. If you want to draw other functions, it is time to do so on that screen.
8. When done, press [F6:Draw].
9. If the screen does not show a lot of the function, you can use the arrow keys to pan (move the center of the graph. You can pan Up, Down, Left, or Right.
   
10. You can also press [SHIFT][V-Window] to set the window limits.
11. You can also press [SHIFT][ZOOM] and select [F5:AUTO
    

If you are looking for the exponential function e^x you find it by pressing [SHIFT] [LN] (between LOG and SIN on 4th row of keys.)
If you want the value of the constant e (the base of natural logarithms) you type e^1
In RUN screen
[SHIFT][LN] 1 [EXE] gives 2.71828182

Yes, and it will do just fine even for Calculus.

To get results in radians you must configure the angle unit to be degree.

1. In Run screen press [SHIFT][MENU] to access (SETUP).
2. Use Down arrow to highlight the line Angle :
3. Press F2 key to select the TAB Radian.
4. Once you do that all values (input of trigonometric functions and polar graph functions OR output of inverse trigonometric functions) are in radians.

If your function is periodic (and all trigonometric functions are) set the window dimensions Xmin = negative (2 or 3)P and Xmax) = (2 or 3) PI. Adjust if necessary to a smaller domain.

The log base 10 function has an inverse: It is the 10 ^x function. It shares the same physical key with the decimal log. Use [SHIFT][LOG].
The natural log (LN) has an inverse alos and that it the exponentila function e^x. It shares the same physical key with it.

Only square matrices that have a non-zero determinant are invertible.

Create a square matrix


Enter the coefficients, pressing the EXE key after each entry.
Press [2nd][QUIT] to go back to main calculator screen (RUN).

Press [OPTN]. You get the following screen. Enter a left parenthesis then press the F2 key to a access the matrix functions.



Press the F1 key in screen above: The Mat identifier appears on screen.
Press [ALPHA] A to insert A after Mat.
Close the parenthesis.
Press [SHIFT][X^-1] sequence. This is what you see on screen.



You can also use the universal power key [^] with -1 as exponent.


When you use the [X^-1] key to invert the two enclosing parentheses are not necessary.

For additional information on other matrix operations, see an earlier post of mine. Here is the link to it.

The inverse of a natural logarithm (ln) is the exponetial (e^x). Both share the same physical key [LN] pour ln and [SHIFT] [LN] (e^x) for the exponential.
Syntax is : [ln] 3 [EXE] gives 1.098612289
exponential of 4: [SHIFT][LN] 4 [=] 54.59815003

The inverse of decimmal logarith is raise 10 to a power. Both share tha same physical key [LOG]
log of 6 : [log] 6 [=] result is 0.7781512504
antilog of 0.77: [SHIFT][LOG] 0.77 [=] result is 5.888436554

For more complicated arguments (expressions) it may be a good idea to use parentheses to enclose the arguments of functions.

You cannot factor a polynomial with the help of this calculator. It does not have a Computer Algebra System or CAS. You can factor it approximately.

1. You can however rewrite the equation 7k^2+23k+6=0 in the canonical form X^2+ (23/7)X+(6/7)=0
2. Calculate its discriminant Delta= (23/7)^2-4*(6/7), which is positive, meaning that real solutions exist.
3. Calculate the two roots x1 and x2 (approximately).
4. The polynomial can be factored as (X-x1)(X-x2)
   

Here is a sequence of screen captures to illustrate how to do it.
Turn calculator ON. Use arrow to highlight STAT and press EXE



Press F5 DIST


Then select F3 CHI


Choose Cpd or Ccd


If you choose Cpd : you must enter the Chi value you want, and press EXE, then the number of degrees of freedom (df) and press EXE. The Execute command is highlighted. This allows you to perform the actions
indicated by the Thumbnails at the bottom of the screen: calculate a value or Draw the distribution.






In the example above I took Chi=1, and df=3 and pressed the CALC menu.

If I press the DRAW menu instead, the distribution is displayed.


If you want the other distribution Ccd, press Ccd instead in screen capture 4.

Part A shows you how to enter your data and calculate some statistical values.

PART A
In the main menu select [STAT] icon to enter Stat mode and display the statistical data lists. Use the satistical data lists to input data and perform statistical calculations. Use the arrows to move the highlighting around the lists.
Exemple: Enter the following values in List 1
1st line enter 90 [EXE]
2nd line 85 [EXE]
3 79 [EXE]
4 75 [EXE]
5 70 [EXE]
6 68 [EXE]
7 56 [EXE]

When finished you press [F2:Calc], then [F1:1Var] and the statistical results appear on screen.
Title of screen : 1-Variable
x bar =74.7142857
Capital Sigma x= 523
Capita Sigma X squared = 39851
x lower case sigma n = 10.5249945
x lower case sigma n-1= 11.3682934
n = 7
Scroll down with Down arrow to access other data
minX =56
Q1=68
Med =75
Q3=85
Xbar -x lower case sigma n =64.1892911
x bar + x lower case sigma n = 85.2392802
maxX=90
Mod=90

All you have to do now, is to look at the theory you learned and interpret what these values mean.


PART B

1. Once you enter your data [MENU][STAT],
2. press [F1:Graph],
3. select Gph1, Gph2, or Gph3.
4. Once the graph of the experimental data is drawn, you will have access to the diverse regression models.
5. Your choices are
   

• [X:Linear]
  
• [Med-Med],
  
• [Quadratic :X^2]
  
• [Cubic;X^3]
  
• [Quartic: X^2].
  
• Press [F6] to scroll right to access the others:
  
• [Logarithmic:LOG],
  
• [Exponential :EXP],
  
• [Power :Pwr] and
  
• [Sinusoidal:Sin]

1. After you select a model and press [EXE], the screen displays the equation and its various coefficients.
2. On that same screen, you have a menu option [F6:Draw].
3. If you select it, the regression curve will be drawn on the same screen as your statistical graph.
4. This allows you to judge if the fit is good. If it is not, you have the option to choose another model.
5. The other option [F5:Copy] allows you to save the regression equation in the Y1, Y2, etc. variables.

http://support.casio.com/manualfile.php?rgn=1&cid=004002005

Here it is, is on casio's webpage:
http://support.casio.com/manualfile.php?rgn=1&cid=004002005
Hope it helped.

Press MENU, then select RUN and press EXE.
Press SHIFT MENU to access the SetUp.
Move cursor to highlight Angle.
In the botton of screen you see the Deg TAB. Activate it by pressing F1.
Here is a screen capture.

From the Menu screen, select STAT (statistics) then press F5 for 'distribution', then F1 for 'normal'.

The inverse trigonometric function share each the same physical key with its direct function. The inverse trigonometric functions are accessed with the [SHIFT] key
[SHIFT] [SIN] accesses the arcsine
[SHIFT][COS] accesses the arccosine
and [SHIFT][TAN] the arctangent.

1. With calculator turned on, press [MENU] if you do not see icons.
2. Use the navigation arrows to highlight [RUN-MAT] icon or press 1.
3. In the Run-Mat screen press [SHIFT][MENU] to enter the (SETUP).
4. Press the DownArrow 5 times to highlight the ANGLE option.
5. Press [F1:Deg] to select degree.
6. Press [SHIFT][EXIT] to (QUIT) the SetUp screen.
7. Do your geometry ( I would say trigonometry).