Post by: monokekie on August 18, 2009, 08:04:27 pm
i am having sooo many troubles using ti89 pls pls help!
how do you convert the answers in exact values from the eulert programme into decimals without having to retype them in the homescreen?
Post by: monokekie on August 18, 2009, 08:06:45 pm
Post by: monokekie on August 18, 2009, 08:07:36 pm
Post by: TrueTears on August 18, 2009, 08:09:18 pm
hey guys.Set calc as approx mode and then run the program.
i am having sooo many troubles using ti89 pls pls help!
how do you convert the answers in exact values from the eulert programme into decimals without having to retype them in the homescreen?
Post by: TrueTears on August 18, 2009, 08:09:42 pm
and and... how do you transfer what you typed in Y1 into the column at the bottom of the homescreen?F4, define, y1(x) = [insert your equation]
also, how do you draw an elipse with a graphics calculator?Solve for y, you will get a positive and negative half
then do define y1(x) = [positive half]
y2(x) = [negative half]
Green diamond F3.
Post by: monokekie on August 18, 2009, 08:13:48 pm
and and... how do you transfer what you typed in Y1 into the column at the bottom of the homescreen?F4, define, y1(x) = [insert your equation]
ohh i see, that's how you type into Y1 from homescreen... :)
so how do you transfer what you typed in "Y=" to homescreen?
Post by: TrueTears on August 18, 2009, 08:14:37 pm
Post by: monokekie on August 18, 2009, 08:20:51 pm
and...
how to get solid of revolutions with TI-89 without doing it manually with the antidifferential equation???(seeking an express way lol)
Post by: Flaming_Arrow on August 18, 2009, 08:32:26 pm
tkx!!and and... how do you transfer what you typed in Y1 into the column at the bottom of the homescreen?F4, define, y1(x) = [insert your equation]
ohh i see, that's how you type into Y1 from homescreen... :)
so how do you transfer what you typed in "Y=" to homescreen?
highlight it and copy and paste
Post by: TrueTears on August 18, 2009, 08:59:43 pm
Post by: xXNovaxX on August 18, 2009, 09:32:51 pm
*sigh*
Post by: Flaming_Arrow on August 18, 2009, 09:56:04 pm
Soz for hijacking this thread but how do you highlight something?
just select it with the arrows
Post by: monokekie on August 18, 2009, 10:25:31 pm
Though im not a methods student (sorry for coming into this thread LOL), with further we also use the TI-nspire (different model to you though i think), and its ridiculous, our textbook is old, and has sooo many examples of using a calcultor on stuff in the chapter which saves valuable time, BUT IT SUES THE OLD CALCULATORS AS AN EXAMPLE!!! It hasn't been updated :(. I brought a book specifically about my calculator on how to use it.....only sueful thing (pffty), is how to create a scatter plot, which was COMMON SENSE, the rest is all about graphs and stuff which seems more for methods
*sigh*
arhhh okay? -__-
*sigh*
Post by: xXNovaxX on August 18, 2009, 10:40:36 pm
Post by: monokekie on August 18, 2009, 10:47:43 pm
i was sighing at your encounter of such a wieredo txtbook.
anywayz... anyone knows:
how to get solid of revolutions with TI-89 without doing it manually with the antidifferential equation???(seeking an express way lol)
Post by: Mao on August 18, 2009, 11:49:25 pm
anywayz... anyone knows:
how to get solid of revolutions with TI-89 without doing it manually with the antidifferential equation???(seeking an express way lol)
there is none [that I know of]
Soz for hijacking this thread but how do you highlight something?hold the 'shift' key (the up-arrow key, next to '2nd' and 'ALPHA') and use the navigational left and right to highlight. You can then use 'cut'/'copy'/'paste' on the selected text, these are located at diamond + '2nd'/shift/'esc'.
Post by: TrueTears on August 18, 2009, 11:51:08 pm
Oh yeah it works, thanks mao!anywayz... anyone knows:
how to get solid of revolutions with TI-89 without doing it manually with the antidifferential equation???(seeking an express way lol)
there is none [that I know of]Soz for hijacking this thread but how do you highlight something?hold the 'shift' key (the up-arrow key, next to '2nd' and 'ALPHA') and use the navigational left and right to highlight. You can then use 'cut'/'copy'/'paste' on the selected text, these are located at diamond + '2nd'/shift/'esc'.
Post by: monokekie on August 22, 2009, 06:23:41 pm
how do you convert ,for eg, 13/2 -----> 6 1/2 by pressing buttons on the calc? ( 89 and 84)
because silly mistakes always occur when i transfer it manually
Post by: lacoste on August 22, 2009, 08:12:37 pm
here's a real noob one, but does trouble me a lot.
how do you convert ,for eg, 13/2 -----> 6 1/2 by pressing buttons on the calc? ( 89 and 84)
because silly mistakes always occur when i transfer it manually
GREEN DIAMOND ENTER !!
:):)
Post by: monokekie on August 22, 2009, 09:16:09 pm
and here's another question:
(http://img513.imageshack.us/img513/8748/tsfx06q4.jpg)
Post by: monokekie on August 22, 2009, 09:37:01 pm
(http://img39.imageshack.us/img39/2928/tsfx06q6.jpg)
i am up to a = positive or negative 5, but am having trouble using the info "direction of motion is greater than pie over two from the positive x axis " to eliminate one, answer says c.
any aidea? tkx
Post by: JuzzLee on August 22, 2009, 10:05:15 pm
lol. tkx
and here's another question:
(http://img513.imageshack.us/img513/8748/tsfx06q4.jpg)
now sub into the equation and then rearrange them, take the common factor
Post by: TrueTears on August 22, 2009, 11:01:33 pm
Another way to get z2 is to dolol. tkx
and here's another question:
(http://img513.imageshack.us/img513/8748/tsfx06q4.jpg)( draw a circular graph then you can see why )
^2 |= )
^2)
=
)
now sub into the equation and then rearrange them, take the common factorout
so
thus
Post by: ryley on August 22, 2009, 11:09:02 pm
EDIT: Sorry about that, see TrueTears post below for correct explanation (although in my defense, it was a typo ::))
Post by: TrueTears on August 23, 2009, 12:02:09 am
To work out if it is a is positive or negative 5, try both when you substitute t=pi/4 for the position vector and see which value of 5 does not cause the resultant vector to be in the first quadrant (ie; angle > pi/2)The question asks for the direction not the position vector that makes the angle.
Sub a = 5 or -5 into the velocity vector and see which makes an angle with the positive x axis thats larger than pi/2