TI89: How to Integrate Using Your Calculator

In this video you will learn how to use your TI89 to find definite and indefinite integrals and also learn a great tip to find the area between curves.

Recap the syntax for indefinite integrals is:
Function you want to integrate , variable of integration

And for definite integrals:
Function you want to integrate , variable of integration, lower limit, upper limit

Category:

Science & Technology

Tags:

• TI89
• TI
• 89
• Integrals
• Integrate
• Area
• Under
• the
• Curve
• Between
• Curves

[kauths25]

when i integrate the same thing as you, instead of getting x^3/3 my calcukator gives me 333.333 even tho i have exactly what you have typed in

[mathmergency]

@kauths25 Press the 'Mode' key, then scroll down until you see an option called 'Exact/Approx' then press the right arrow and select 'Exact'. That should do it!

[dendeanda]

I'm trying to find area between y=x+6 and y=x^2 between x= -2 and x= 3. When i enter - 2 it says syntax error :o( Am I doing something wrong?

[mathmergency]

@dendeanda Where are you entering the -2? This is the syntax that you want to use:

Function you want to integrate , variable of integration, lower limit, upper limit

so it should look like this on your screen:

integral symbol(x+6-x^2,x,-2,3)

Let me know if you still need help.

[TheNeoSwoosh]

isit just me or is the sound numingly quiet?



[iFr4ntiK]

Why, when you entered the functions both as 3X and x^2 and as y2 and y1 did you get a different answer for the area? Shouldn't it be the same since they both mean the same thing?

[taekwonwelchify]

oh my god, you are freakin awesome!! thank you!!!

[kiwi7676]

Hi your videos are very helpful! Can u help me integrate this please?? I dont understand why it either keeps saying too few arguments or syntax :( thanks in advance!!

(sin(5x))^3*(cos(5x))^5

[kiwi7676]

hi why are u integrating with the 3 instead of the 4 for the intervals??

[TheSantiagok810]

when i integrate the same thing as you, my calc shows me "' non algebraical variable'', what can i do to fix it?

[Cj90RAK]

thanks it was helpfull thanks again for sharing



[fz2176]

Hi. Whenever I integrate a function, such as x^2 for example, and I don't specify the limits, I get an answer of 0 instead of the expected x^3/3. I have the same issue with differentiation. When I specify my limits I do get the right answer, however. Not sure why I keep getting 0 when I should be getting a function. Please help.

[andreasahlqvist91]

Thanks for this perfect video. It saved my day :)

[julian12lopez]

can the ti-89 solve convergence or divergence? and how if it can?

[slowassgsr]

WOOOOOOOOOOOOW.... my volume is turned all the way up I still cant hear shit.

[lxw930720]

@joce138 i have the same problem!