User manual - Chapter 3 Differential Equations

20010101
Example 1 To graph the solution of first order differential equations with two
unknowns below.
(y1)쎾 = (y2), (y2)쎾 = – (y1) + sin x, x0 = 0, (y1)0 = 1, (y2)0 = 0.1, –2 < x < 5, h = 0.1.
Use the following V-Window settings.
Xmin = –3, Xmax = 6, Xscale = 1
Ymin = –2, Ymax = 2, Yscale = 1
Procedure
1 m DIFF EQ
2 4(SYS)
3 2(2)
4 3(yn)cw
-3( yn)b+svw
5aw
bw
a.bw
6 5(SET)b(Param)
7 -cw
fw
8 a.bw*
1
i
9 5(SET)c(Output)4(INIT)
cc1(SEL)
(Select (y1) and (y2) to graph)*
2
i
0 !K(V-Window)
-dw
gw
bwc
-cw
cw
bwi
! 6(CALC)
Result Screen
3-5-2
System of First Order Differential Equations
*
1
*
2