Solving Equations Using the TI 89

[rubiconsedge]

Does anyone know how to get to the equation solver on a TI89?

[foeasy16]

Thanx a lot man!!! All praise be to Allah!

[ezman86]

thanks so much. 

[saultman]

Thanks very much for sharing and much appreciated!!

[swimweeman25]

Great video!!!

How do you solve a system of complex numbers?? Every time I try using csolve to solve a system of imaginary numbers with 2 or more variables it freezes. When I restart it it says Error:Break

Do you have any idea?

[juanoekmexico]

awesome!

[cavelier23]

1 person is Stephen Hawking

[xoxoband3]

when i did the solve (y1 (x) = y2(x), x), my answer came out to be e^2x cos(x) = -2. Does this mean that the answer is -2? Because yours said x= 0.

[Hoyacap88]

hello, I just bought this calculator. It seems very confusing. Can you please tell me how you made it so that the digits look large on the screen?

[Theisland1000]

just wat i was looking for. Excellent video

[heurlin1980]

i need to be able to "show my work" is there a calc that will do that.

i can do the math on paper... i just want to double check my self.

[SuperCuse123]

grear vid

[jason007thomas]

is it possible to compute the chain, quotient or product rule on the ti-89 in order to check your answer.

[jessejames4518]

can anyone let me know which programs are needed and which are just taking up space on the TI-89? Thanks

[6554437]

thank you

[scttzwdrff]

Thank you. This is great.

[bluethunder454]

Roy,sometimes when solving an equationj the answer will display as a decimal number which is unacceptable on my tests, I still have to show my work evien though I can use the ti89 to get the correct answer. However if the answer is not in a fractional form it is considered wrong how can I make the answers that display as a decimal show as a fraction or radical.

[motowheelp314159]

@bluethunder454 push the "MODE" button on you're calculator, scroll down to "Exact/Approx" and select "EXACT"

[fleitan]

Hi Roy, Thanks for these videos. They're superhelpful. In trying to pick the right calculator, can you tell me whether the ti-89, or any of the Ti- calculators can solve long strings of variable equasions? For example, an equation like 12x^3-7x^2+8xy-17x^4y-10x^2y^3­, without providing a value for x or y...?

[LivingSymbiote]

how do you multiply, add and subtract on this thing?

[desertfox1792]

2:52 when I inputed to solve for sin it gave me x=180 * @n1 is that the same?

[JamieCivil]

@desertfox1792 yes. this means that in your calculator in the midle it says DEG auto which means you have your answer in degrees if you want it in radians you can press ( mode): and in the angle select radian. Enter enter :)

[jreylbc1]

Thank you! Excellent videos!

[CRazorMorfin]

Very good video. I am going to buy that calculator, but i have to know if it can solve systems like this.

3*3. ex.

(1) x=y+z

(2) x(45+j67)+y(14+j85)-z(52+j14)=­0

(3) x(18+j63)+y(13+j45)-z(55+j11)=­0

Please help, its important to me... Thank you

[endauthority]

i hate this calculator.

it has too much for its own good, its impossible to navigate which ultimately ends up with confusion for simple tasks.

The best part about it is figuring out that the minus sign isnt used for making a number negative, the (-) button is.

Genius!

[bbstapleton]

thx

[besmyra]

awesome!!!!!!! thx a lot, this was really helpfull. i'm very gratefull

[besmyra]

awesome! thx, this was really helpfull

[mathmergency]

@TheKrakatoa1 I don't know if it is or isn't.

@samirdubois Yes the TI-89 can solve Diff Eq's.

[samirdubois]

can this cal solve Diferetial equations??

[TheKrakatoa1]

are you allowed with this in IB (international baccalurate)

[3mora3mora3mora]

Thanks :)

[krasser19]

Thanks a 1000 times. This was very helpful.

[piratecheese13]

ti-89 regular user

can i make proofs?

[mathmergency]

@piratecheese13 The TI89 doesn't do proofs unless the proof is by transitivity with equations. i.e. The TI89 will show that Sin(x) = Cos(x)Tan(x), but even then it won't give you the steps involved, only tell you that it is true.

[mjolnir1981]

how would you solve a system of 4 equation with 4 variables

[mathmergency]

@mjolnir1981 I would use a matrix and the rref command.

[mrlarge12]

@mathmergency How about solving something like this

-8x / (x^2+y^2-2) = -8y / (x^2+y^2-2) how would you add exclusion to the solve comand?

if it can be done

[BDGregory]

@mjolnir1981or like this:

solve(equation1 and equation2 and equation3 and equation4, {var1, var2, var3, var4})

[McBirdec]

I typed in solve(sin(x)=0,x) and I got x=@n40*pi ... i should've gotten @n1??

[mathmergency]

@McBirdec the "@n1" means any integer number. i.e. whole numbers or negatives, not fractions or decimals. So x=@n40*pi means any multiple of pi. Also, this number increases every time it is used. So you got @n40 this time, you will get @n41 next time and so on.

[ToxicOdiousOne]

Why does log(4,2) give me the error too many arguments?

[mathmergency]

@ToxicOdiousOne Please make sure that you have the most current version of the OS from Texas Instruments.

[javprincess]

Thank you, this helped a lot.

[angelusp777]

solve this "sin(x)+x=0"

[mathmergency]

@angelusp777 Sin[x]+x=0 -> Sin[x]=-x, It looks like 0 is the only real number that works for that.

[samirdubois]

@mathmergency can u do diferential equations??

[bwill105]

Good video. I just purchased the TI - 89 and this video was really informative and helpful. Thank you.

[navyhermano]

really good video

keep it up.

do you know how to find the qube root

of a number with the ti 89?

[robpalomares]

@navyhermano: Just type the number and put 1/3 as the exponent (in parenthesis).

Ex: 27^(1/3) = 3.

[mathmergency]

@navyhermano You can always convert the root to exponential form. Also the TI89 has a command called "root" the syntax is:

root(number you want to take a root of, root)

So to find the cube root of 27 enter:

root(27,3)

[fingerboy18]

@navyhermano x^(1/3)

[mvasque5]

this was so helpful.. you just save my life

[ryani810]

Thanks for the video! are there any videos on solving rational exponents and roots? how about ((15x^(2)y-20x^(4)y^(2))/5xy) ? Thanks

[massage320]

I enjoyed this video

[navyhermano]

great video