Sharp EL-9900 - Manual (Page 150)

17
Advanced Keyboard/PROGRAMMING USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
1. Program the calculator to graph the slope field for a differential equation at
a finite set of points.
2. Create a new program with the name SFIELD. Enter the following
program and remember to press ENTER at the end of each line. If you
make a mistake, use the calculator’s editing features to correct the error.
3. Enter the following program:
ClrDraw 2ndF DRAW A 1 ENTER
.1
⇒H
. 1 STO ALPHA H ENTER
ipart Xmin
⇒J
MATH B 3 2ndF VARS B ENTER A 1
STO ALPHA J ENTER
ipart Ymin
⇒K
MATH B 3 2ndF VARS B ENTER A 4
STO ALPHA K ENTER
J
⇒X
ALPHA J STO X/
θ/T/n ENTER
K
⇒Y
ALPHA K STO ALPHA Y ENTER
Label A PRGM B 0 1 ALPHA A ENTER
X+H
⇒A
X/
θ/T/n + ALPHA H STO ALPHA A
ENTER
If X
≠0 Goto B
PRGM B 0 3 X/
θ/T/n MATH F
2 0 PRGM B 0 2 ALPHA B
ENTER
.00001
⇒X
. 0 0 0 0 1 STO X/
θ/T/n ENTER
Label B PRGM B 0 1 ALPHA B ENTER
(sin X
÷X)
( sin X/
θ/T/n ÷
X/
θ/T/n ) ( ALPHA
(A–X) +Y
⇒B
A – X/
θ/T/n ) + ALPHA Y STO
ALPHA B ENTER
A
⇒C
ALPHA A STO ALPHA C ENTER
B
⇒D
ALPHA B STO ALPHA D ENTER
X–H
⇒A
X/
θ/T/n – ALPHA H STO ALPHA A
ENTER
(sin X
÷X) ( sin X/
θ/T/n ÷
X/
θ/T/n ) ( ALPHA
(A–X) +Y
⇒B
A – X/
θ/T/n )
+ ALPHA Y STO
ALPHA B ENTER
SLOPE FIELDS