Education Technology

# Knowledge Base

## Solution 11763: Graphing a Differential Equation on the TI-89 Family, TI-92 Family and Voyage™ 200 Graphing Calculators.

### How can I graph a differential equation on the TI-89 family, TI-92 family or Voyage 200?

The example below shows how to graph a differential equation on the TI-89 family, TI-92 family or Voyage 200 graphing calculator.

Example: Graph the function y'=2y*cos(t)

Solution:

1) Press [MODE].
2) For Graphing Mode, select 6:DIFF EQUATIONS and press [ENTER].
5) Press [♦][F1] (On the TI-92 family and Voyage 200 press [♦][W])
6) Enter y1'= 2y1*cos(t).

Please Note: That the y is replaced with y1. This is because y' is itself replaced with y1'.

7) Press [F1][9] to access the Format menu.
8) Make sure that the setting Axes ON and the Fields as SLPFLD are selected and press [ENTER].

9) Press [♦][F3] to display the graph (On the TI-92 family and Voyage 200 press [♦][R])

Please see the TI-89 family, TI-92 family and Voyage 200 guidebooks for additional information.