Question about Texas Instruments TI-84 Plus Calculator

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I have this different type of graph, it is onle showing the right side of my graph...I can only see the positive x axis. How do I change it to the full graph, where I can see the positive and negative x axis'

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Press MODE to bring up the mode screen. Use the arrow keys to highlight "FULL" on the eighth line and press ENTER. Press 2ND [QUIT] to exit the mode screen.

Posted on Feb 03, 2011


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Hi, How do i find the upper bound on a casio calculator when the lower bound, the function and the area (integration value) are given?

Let us consider this to be math problem. From the physics point of view the units are inconsistent:thus the problem is ill-posed.
What you need it to draw the graph pf the function y=cos(t^2), then the integration feature of the calculator to calculate the integral between 0 and some upper limit, which will be found by trial and error.
Here are some screen capture to help you along the wayimage 1-kgpayaan5mwqlexbne0izpdg-2-0.jpg
Make sure the graph type is y=cos(X^2). Don<t worry the variable in this type of graph must be Ximage 2-kgpayaan5mwqlexbne0izpdg-2-1.jpg
Choose the window to start at x=0image 3-kgpayaan5mwqlexbne0izpdg-2-3.jpg

Here is your graph.
image 4-kgpayaan5mwqlexbne0izpdg-2-6.jpg
Press SHIFT F5 (G-Solv) You see the following image
image 5-kgpayaan5mwqlexbne0izpdg-2-10.jpg
Press F6 (Arrow pointing right) to access the other features, as on the following screen:
image 6-kgpayaan5mwqlexbne0izpdg-2-21.jpg
You see the integral sign above F3: Press F3 to do integration.

image 7-kgpayaan5mwqlexbne0izpdg-2-28.jpg
Use the left Arrow key to move the cross on the graph to X-0 or just enter 0. and press EXE. This is the lower bound.
image 8-kgpayaan5mwqlexbne0izpdg-2-36.jpg
You need to enter the upper bound. Since you do not know where to stop you must try different values and each time, read the value of the integral. For example if you enter Xupperlimit=0.5image 9-kgpayaan5mwqlexbne0izpdg-2-45.jpg
the value of the integral is 0.45 (not 1)image 10-kgpayaan5mwqlexbne0izpdg-2-55.jpg
Repeat the process changing the upper limit until (if you are lucky) you hit an integral of 1.
Now a few more pictures

image 11-kgpayaan5mwqlexbne0izpdg-2-66.jpg
image 12-kgpayaan5mwqlexbne0izpdg-2-78.jpg

image 13-kgpayaan5mwqlexbne0izpdg-2-91.jpg
Getting close. Now I use the 1st zero of the function, x=1.2533 approximate
image 14-kgpayaan5mwqlexbne0izpdg-2-105.jpg
Getting close. However from that zero to the next the area under the curve under the x-axis is negative and there will not be a solution until maybe somewhere in the second positive part.
So you can accept the value of the integral from X=0 to the 1st zero (1.2533) to be about 1. Or you will keep playing the game. But as the next picture shows, you will not get a better approximation than at the first zero.

image 15-kgpayaan5mwqlexbne0izpdg-2-120.jpg

Good Luck.

Oct 12, 2016 | Casio Fx-9860gii Graphing Calculator

1 Answer

How do you change the units on the x-axis to terms of pi?

The xmin and xmax values are the left and right endpoints (respectively) for the x-axis. In window settings type - pi and + pi for your request. At fist type diamond button and then F2 to get window menu

Mar 22, 2014 | Texas Instruments TI-89 Calculator

1 Answer

When i type in a trig function to graph, the mode is set to radians but the calculator continues to use degrees. How do I make it graph using radians on the x-axis?

The calculator OS (the latest version) has 2 angle settings: Graphing angle and geometry angle.
In Graph mode, Press the menu button, then select Settings, set graphing angle to radians.
Here are some screen captures to help you.
Be sure to validate your changes by pressing OK


Jan 25, 2013 | Texas Instruments TI-Nspire Graphic...

1 Answer

My TI-84 PLUS calculator wont show the graph after i type in an equation. please help!

You need to fix your graph so that it shows the correct y-axis and x-axis.
It works best if you press the zoom button and then scroll to find the ZoomFit option.
Then the graph should show up.

Jun 15, 2011 | Texas Instruments TI-84 Plus Calculator

1 Answer

How to chang the size of the numbers

The title of the thread and the body of the question do not seem related. Or maybe I do not understand

A. Font size
If you want to change the font size in documents.
  1. Press the Home button
  2. Use arrows to highlight 8:system Info
  3. Press the Click button
  4. Select 2: System Setting and Press Click
  5. Use the tab key to highlight the Font size
  6. Use the down Arrow to unfold the menu and select Large
  7. Use the Tab repeatedly until you reach the OK button and Click or ENTER
  8. Accept the changes by pressing Yes.
Graph window ZOOM

If you have a graph and geometry document open (whether there is a graph or just the axes)
  1. Press the MENU button
  2. Select 4:Window
  3. Press Right Arrow to unfold the menu list
  4. Select the Zoom type
  • Window settings: You set your values
  • Zoom box: Select the corners of the box by moving cursor to desired position and press ENTER or Click.
  • Zoom In select center of graph and the graph will be redrawn
  • Zoom Out select the center
  • Zoom Standard :Standard window dimensions (default values)
  • Zoom Quadrant 1; restrict the graph to the first quadrant
  • Zoom Trig: When drawing trigonometric functions, dimensions are multiples of Pi.
  • Zoom Fit : The zoom is arranged to encompass all data.
  • Zoom square.
You can do certain manipulations by moving the cursor towards the axes. When the hand appears press Click/hand to grab. Pull out (away from an axis) or in (towards an axis). You can pull horizontally or vertically. The graph will react to the pull.

Jan 31, 2010 | Texas Instruments TI-Nspire Graphic...

1 Answer

Err: no sign chng

When you get the sign change error it is either that you have mixed up the left bound and the right bound or that you are marking the left and the right bound both above the x-axis or both below the x-axis. That's why you get the sign change error. Your range values must have different signs.

Aug 19, 2009 | Texas Instruments TI-84 Plus Silver...

4 Answers

How to graph linear equation in two variables

I am not quite sure what you are asking...

(1) if asking for graphing y= -2/3x+2, then press [diamond] [F1: Y=] type in .2/3x +2, see graph by [diamond][graph]

(2) if asking for graphing y= -2/3x+a, where a=3x, then first archive a=3x in Home screen by [home], type 3x [sto] a, then go back to y= menu, and type -2/3x+a in Y1

(3) if asking for graphing an equation that is dependent on 2 variables at the same time, use x-y-z axis (aka, change mode to graphing 3-D by [mode]graph [5:3D]) then enter desired equation in y= menu using Z function in terms of x and y aka z(x,y)= ...)

May 18, 2008 | Texas Instruments TI-89 Calculator

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