Sharp EL-9900 - Manual (Page 91)

16
Advanced Keyboard/CALCULUS USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
A program for finding the trapezoidal approximation for an area.
Input N PRGM A 3 ALPHA N ENTER
Input A PRGM 3 ALPHA A ENTER
Y1(A)
⇒L
2ndF VARS A ENTER A 1 ( ALPHA A ) STO
ALPHA L ENTER
Input B PRGM 3 ALPHA B ENTER
Y1(B)
⇒R
2ndF VARS ENTER 1 ( ALPHA B ) STO ALPHA R
ENTER
0
⇒Z
0 STO ALPHA Z ENTER
(B–A)÷N
⇒W ( ALPHA B – ALPHA A ) ÷ ALPHA N STO
ALPHA W ENTER
A+W
⇒X
ALPHA A + ALPHA W STO X/
θ/T/n ENTER
Label LOOP PRGM B 0 1 2ndF A-LOCK L O O P
ALPHA ENTER
2Y1(X)+Z
⇒Z
2 2ndF VARS ENTER 1 ( X/
θ/T/n ) + ALPHA Z STO
ALPHA Z ENTER
X+W
⇒X
X/
θ/T/n + ALPHA W STO X/θ/T/n ENTER
If X PRGM B 0 3 X/
θ/T/n MATH F 5 ALPHA B
LOOP PRGM 0 2 2ndF A-LOCK L O O P ENTER
ClrT PRGM C 1 ENTER
Print "TRAP= PRGM A 1 PRGM 2 2ndF A-LOCK T R A P =
PRGM 2 ENTER
Print (W÷2) PRGM 1 ( ALPHA W ÷ 2 ) ( ALPHA
(L+Z+R) L + ALPHA Z + ALPHA R ) ENTER
End PRGM 6 ENTER
Execute like the rectangular program to find an approximate area of .83866.
TRAPEZOIDAL
APPROXIMATION OF AREA