Texas Instruments TI-89 Titanium User Manual page 433

20. Press ... to trace, and then press C or D
until is selected. (1 shows in upper
y1
right corner.) Then enter 40.
By moving the trace cursor to trace each solution to
• The exact solution (
• The solution (
RK
• The solution (
Euler
You can also use the
.
time = 40
Example of the deSolve( ) Function
The function lets you solve many 1st- and 2nd-order ordinary differential
deSolve( )
equations exactly.
Differential Equation Graphing
) is 85.8486, rounded to six digits.
y1
) is 85.8952.
Plot 1
) is 85.6527.
Plot 2
Data/Matrix Editor
Euler (Plot 2)
RK (Plot 1)
Exact solution (y1)
y1 is selected when
1 shows here
xc = 40
to open the errorlog data variable and scroll to
, you can find that:
430