Question about Texas Instruments TI-84 Plus Silver Edition Graphic Calculator

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Calculator is drawing vertical asymtotes. - Texas Instruments TI-84 Plus Silver Edition Graphic Calculator

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There is no vertical (or otherwise) asymptote feature on a TI84PLUS. It seems to you that the calculator is drawing the asymptote. However when you plot a CONNECTED Graph a line is drawn from one point to the next: The last point on one side of the asymptote is thus connected to the first point on the other side, effectively mimicking the drawing of the asymptote.
To get rid of this spurious effect, draw dotted graphs, but you will see fewer points, because the points are drawn at constant intervals in X. This is set by the Xres variable, in the Window configuration screen.

Here is a function that will "show" you a vertical asymptote on the TI84PLus, when graph is drawn connected, but on a calculator with a higher resolution, you see none. A calculator cannot handle infinity. You can with the help of your mind's sight, so to speak, see the asymptote on the graph.

Calculator is drawing vertical asymtotes. - 9246520.jpg

Posted on Aug 20, 2010

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The asymptote you see is in truth a spurious effect. It appears when you draw connected graphs. There is no command that turns that "non-existing feature" ON and OFF.
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Sep 19, 2010 | Texas Instruments TI-84 Plus Silver...

1 Answer

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1 Answer

I would like to input a graphing range with a restriced domain. For example SIN X with a RANGE -2pi to 2pi you see that, 4 half curves. Now I would like to see the same SIN X plotted in a Minus ONE to ONE...


I am enclosing a link to a web page that gives you the definition of the domain of a function and its range. You should read it to correct the confusion you entertain between domain and range.
In what follows I will speak of X and Y values.
Let me restate what I think you wanted to do. Ignore my rambling if you do not recognize your intention.

You want to draw the sin(X) function for X varying from Xmin= -2*pi radians to Xmax=2*pi radians. However, it you do not specify the Ymin and Ymax values for the vertical window dimensions a big portion of the screen is not used (vertically) and you want the height of the curve to take most of the screen. Specifically you want to set the vertical height of the window to go from Ymin=-1 to Ymax=1.

Press [SHIFT] [F3:V-Window] to set window dimensions.
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You may or may not want to change the X(scale) and the Y(scale)
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Here is what you will get.

362fd1e.jpg


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1 Answer

How do I turn off the vertical asymptote feature?


Hello,
There is no vertical (or otherwise) asymptote feature on a TI84PLUS. It seems to you that the calculator is drawing the asymptote. However when you plot a CONNECTED Graph a line is drawn from one point to the next: The last point on one side of the asymptopte is thus connected to the fisrt point on the other side, effectively mimicking the drawing of the asymptote.
To get rid of this spurious effect, draw dotted graphs, but you will see fewer points, because the points are drawn at constant intervals in X. This is set by the Xres variable, in the Window configuration screen.

Hope it helps.

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1 Answer

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Hello,
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Hope it helps.

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2 Answers

GRAPH


hey faymalaka
what's up. ok so you can't do what you want to do. It just can't be done. I'm pretty sure it can be done on a casio. however, you can do it just not by graphing. (this is on your TI) ok so first go to 2nd ZOOM and turon off the Axes and the Expr. Then Go to 2nd Prgm. Then go to A or Pen. and you can draw. as long as you first go to pen then you can draw lines and circles and stuff like that. but you must first go to draw then pen. then a suggestion i would save it by hitting 2nd prgm then going right to STO. this allows you to save your drawins as like 1 or 2 or so one. and then if you want to start over from your last picture because you made a mistake just clrdraw and then start over by recalling it. THis is under the store function. by the way the pen turns on and off with the enter button. GOOD luck if you don't get it feel free to ask questions.

Feb 09, 2008 | Texas Instruments TI-84 Plus Calculator

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