TI Talk
Oct 25th, 2010 by corricelli
Hello,
Please use this location to discuss any and all graphing calculator issues. Some of you have already started great conversations…
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Happy Blogging,
Mrs. Corricelli
Hi everyone, for those of you who are slow at using the quadratic formula or need the extra speed boost when using it so u can spend your time more efficiently i’m posting the code for the quadratic formula program. i made this up on my own with a little research to find the proper code to make it work.
To make it all you need to do is go to PRGM over to new and enter. then write out a name so you can recognize it (something like “QUAD”) and hit enter then type up the code below if you don’t know were to find a specific term I’ve listed were most of them are underneath the code. If you have any problems please feel free to contact me for help.
ClrHome
Lbl A
Input “A=”,A
If A=0
Then
ClrHome
Output(4,6,”A(cannot equal)”)
Pause
ClrHome
GoTo A
Else
Input “B=”,B
Input “C=”,C
a+bi
(B)^2-4(A)(C)(STO)D
(negative)(B)-sqrt(D)(STO)E
(negative)(B)+sqrt(D)(STO)F
(E)/(2A)(STO)Y
(F)/(2A)(STO)Z
ClrHome
Disp “DISCRIM”,D
Disp “ZEROES”,Y,Z
Real
(ClrHome) is found at PRGM , right , 6
(Lbl) is found at PRGM , 9
(Input) is found at PRGM, right , 1
(If) is found at PRGM , 1
(Then) is found at PRGM , 2
(output( ) is found at PRGM, right, 6
(cannot equal) is a sign found at 2nd, MATH, 2
(Pause) is found at PRGM , 8
(GoTo) is found at PRGM , 0
(a+bi) is found at MODE, Scroll down and to the right of REAL
(STO) is a key above (ON) that will show up as an arrow
(Disp) can be found at PRGM , right , 3
Hello everybody, I’m just posting my program for the quadratic formula, which I found largely through trial and error, as I’m a TI-BASIC newbie. I see Steve beat me to it, curse my procrastination, but our programs, I was glad to see, have significantly different structure. Try them both, see which one you prefer. I find Steve’s to be more definitive in its answers, but mine to be simpler in structure.
Prompt A,B,C
If A=0
Disp “CANT /0″
If A=0
Prompt A
If A=0
Disp “HAVE IT YOUR WAY.” <- (or your own demeaning text)
If A=0
Disp "IM OUT" <-(Whatever text you want)
If A=0
Stop
(negative)(B)+sqrt(B(squared)-4(A*C)))/2A(sto)U
(negative)(B)-sqrt(B(squared)-4(A*C)))/2A(sto)V
Disp "X1="
Disp U
Disp "X2="
Disp V
(If) is found at PRGM , 1
(Prompt) is found at PRGM, 2
(cannot equal) is a sign found at 2nd, MATH, 2
(Disp) is found at PRGM, 3
Comments (negative ones included) and questions are always welcome.
Hi Mrs. Corricelli,
I was entering some data into my calculator, and instead of highlighting “L1″ and pressing clear, then enter, I accidentely hit delete, enter. So I have deleted my “L1″ column. I have done this before, and you told me what I needed to press to get “L1″ back, but I have forgotten. How do you do it again?
Sarah,
Hey – did not notice this post until just now. Sorry.
Ok – so it is STAT then Setup editor. Press enter; it will say “Done”.
You will then have your L1 column back, good as new!
Happy “TI-Calculatoring”,
Mrs. Corricelli
My very long program for sections 6.1 and 6.2 on the law of sine and cosine. What this does is you give it two sides of a triangle and an angle or 3 sides no angles or whatever your given that will generally give you one triangle that is real. if it isn’t real your going to get a weird answer from it. It will ask angle 1 angle 2 angle 3 then 1 2 and 3 and what they equal to make it work put in whatever angle you want as 1 (unless you have no angles and all side lengths you need to put a number there) and then the other angles, the only thing you need to watch out for is angle 1 is opposite of side 1, ( like the A and a for the triangle out of the book, i just didn’t use letters cause it got confusing), anyways here’s the program if you have a question, message me somewhere or talk to me in school also if you have an improvement please let me know.
ClrHome
input “angle(1=”,A
input “angle(2=”,B
Input “angle(3=”,C
Input “1=”,D
Input “2=”,E
Input “3=”,F
If D(doesn’t equal)x and E(doesnt equal)x and F(doesnt equal)X
then
Goto F
Else
If B=x and c=x and D=x
Then
sqrt(F(squared)+E(squared)-2(F)(E)cos(A))(sto)D
Goto F
Else
If F=x and C=x
then
If a=x
then
arcsin((sin(B)(times)D)/E)(sto)A
Goto A
If D=x
then
sin(A)B/sin(E)(sto)D
goto A
else
If B=x
then
arcsin(sin(A)B/D)(STO)B
Goto A
Else
If E=x
Then
(sin(B)D)/sin(A)(sto)E
Goto A
Else
Disp “ERROR”
Lbl A
180-B-A(STO)C
(sin(C)(times)E)/sin(B)(STO)F
Goto D
Else
Disp “Do it different”
End
Lbl F
arccos((D(squared)+E(squared)-F(squared)/(2DE))(sto)C
arccos((E(squared)+F(squared)-D(squared)/(2EF))(sto)A
arccos((D(squared)+F(squared)-E(squared)/(2DF))(sto)B
goto D
lbl D
Disp “angle(1=”,A
Pause
Disp “angle(2=”,B
pause
Disp “angle(3=”,C
Pause
Disp “SIDE(1=”,D
pause
Disp “SIDE(2=”,E
Pause
Disp “SIDE(3=”,F
Pause
(ClrHome) is found at PRGM , right , 6
(Lbl) is found at PRGM , 9
(Input) is found at PRGM, right , 1
(If) is found at PRGM , 1
(Then) is found at PRGM , 2
(Else) PRGM , 3
(output( ) is found at PRGM, right, 6
(cannot equal) is a sign found at 2nd, MATH, 2
(Pause) is found at PRGM , 8
(GoTo) is found at PRGM , 0
(a+bi) is found at MODE, Scroll down and to the right of REAL
(STO) is a key above (ON) that will show up as an arrow
(Disp) can be found at PRGM , right , 3
(squared) is squared button above log
(angle() is found under MATH, right twice, and 4
(times) just multiplication sign
(=) found at 2nd MATH , 1
that should be all the different characters
accidentally forgot to say for my program above that for unknowns you put in ( x ) which is next to ALPHA
I just wrote a nifty program for calculating interest, doesn’t save as much time as, say, a program for quadratics, but it’s useful none the less. I might make changes to it later, but it does what it needs to for now. #number signs mark a note#
Disp “PRINCIPAL?” #the initial amount#
Prompt P
Disp “RATE?” #4%=.04, 2.5%=.025, etc.#
Prompt R
Disp “PER YEAR?” #this is the number of times the interest is compounded each year, 12 for monthly, 4 for quarterly, etc.#
Prompt C
Disp “YEARS?” #number of years interest is calculated#
Prompt Y
(1+(R/C))^(C*Y)sto>L
P(L)sto>K
Disp K
And there you have it.
I made an addition to my interest program that allows it to find the interest of an amount if the number of times it compounds each year is “e”.
Disp “PRINCIPAL?”
Prompt P
Disp “RATE?”
Prompt R
Disp “PER YEAR?”
Prompt C
Disp “YEARS?”
Prompt Y
If C=e
Goto A
(1+(R/C))^(C*Y)sto>L
P(L)sto>K
Disp K
Stop
Lbl A
P(e^RY)sto>M
Disp M
Just post if you find any issues with it.
how do you use a graphing calculator to construct a bar graph that represents a sequence? this is for 125a. on the homework for monday, 4/11. i’ve plugged in the x and y on the STAT Edit… but i don’t know how to make the graph into a bar graph.
Will,
We talked in class, but I’ll answer here too…
A bar graph is a one-dimensional graph – you need to input the data in L1 and select that plot option in StatPlot.
http://archives.math.utk.edu/ICTCM/VOL11/C049/paper.pdf is a decent site with a lot of other information.
Take care,
Mrs. Corricelli
To whomever it may concern,
Read this if you would like a brief description of how to make a referance tool for yourself with the calculator, you can put anything in this base outline and all u do is run the program and you see what you wrote
now first thing you need to know is the “Menu(” command
If you want to keep things organized then remember how it works it uses “LBL” command to skip around so basically an example would be
Lbl Z
Menu(“Title”,”Name of place you want to go”,A)
Lbl A
Disp “BLAH”
Pause
Goto Z
Now that’s a complete program, notice how the first line is Lbl Z, that’s to set a checkpoint so at the end of a section it can reset itself.
Also notice how there its a “title” after menu, that’s were u can name the menu.
the other command u wanna know is the “disp” command, if u put something in parentheses after it’ll display it on the main screen.
if u got any questions post, sorry i cut short
@Steve: What exactly is this program for? It looks interesting.
Also, I was wondering if there is any way to graph on a 3D plane using our TI calculators? (I researched and found that a TI-89 can, but what about our TI-83/84s?)
My program about is a template for writing a resource for yourself like if u need to remember a formula, it also can be used to compile multiple programs together, I’ve used that kind of menu format using “lbl”s to keep programs that are related together,
For instance
Menu(“title”,”program1″,a,”program2″,b)
Lbl a
(insert program here)
Lbl b
(insert 2nd program here)
Now 1 thing to keep in mind is the pause goto z I used above so that it doesn’t go straight from program a to b without showing ur answer. I hope this helps.btw looks like this.
Lbl z
Menu(“title”,”program1″,a,”program2″,b)
Lbl a
(insert program here)
Pause
goto z
Lbl b
(insert 2nd program here)
Pause
goto z
at first i couldn’t remember how to use the TI calculator especially for the graphing but as we went through i remembered exactly what to do today
using the TI clculator has helped me alot and it is also showing me how to properly use it and practice for the psat’s
Hi Mrs. Corricelli,
I recently purchased a graphic calculator that was super expensive. I know you sat they will help for SAT but I think that my previous TI calculator was alot easier to use and figure out. Does it just take some getting used to?
- Molly
Molly,
Come see me – 20 min and I bet you will have lots of new tools at your disposal!
Let me know,
Mrs. Corricelli