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4
Advanced Keyboard/CALCULUS USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
Enter and execute a program for finding a tangent line to a curve
at a given point.
1. Turn the calculator on and press PRGM to enter the programming
menu.
2. Press C (NEW) and ENTER to open a new program.
3. Name the new program TANGENT by pressing T A N G E N T
ENTER .
4. Press ENTER at the end of each line. If you make a mistake, use the
calculator's editing features to correct the error. Enter the following program:
PROGRAM KEYSTROKES
Input X PRGM A 3 X/θ/T/n ENTER
(Y1,X)⇒M MATH A 0 5 2ndF VARS A ENTER A 1
,
X/θ/T/n )
STO ALPHA M ENTER
Y1(X)⇒Y 2ndF VARS A ENTER 1 ( X/θ/T/n ) STO ALPHA
Y ENTER
-
M
xX+Y⇒B (–) ALPHA M × X/θ/T/n + ALPHA Y STO ALPHA
B ENTER
ClrT PRGM C 1 ENTER
Print PRGM A 1 PRGM 2 2ndF A-LOCK T A N G
"TANGENT E N T SPACE L I N E = ALPHA ENTER
LINE= PRGM 1 PRGM 2 ALPHA Y ALPHA = ALPHA
Print M X/θ/T/n + ALPHA B ENTER
"Y=MX+B
TANGENT LINES
d
dx
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