HP 33S Owner's Manual

15–12 Mathematics Programs
File name 33s-E-Manual-1008-Publication(1st).doc Page : 386
Printed Date : 2003/10/8 Size : 13.7 x 21.2 cm
125
¥


Sets T equal to 125.
63
¥


Sets P equal to 63.
t
D


Calculates dot product.
¥


Calculates angle between
resultant force vector and lever.
¥


Gets back to input routine.
Solutions of Simultaneous Equations
This program solves simultaneous linear equations in two or three unknowns. It
does this through matrix inversion and matrix multiplication.
A system of three linear equations
AX + DY + GZ = J
BX + EY + HZ = K
CX + FY + IZ = L
can be represented by the matrix equation below.










=




















L
K
J
Z
Y
X
IFC
HEB
GDA
The matrix equation may be solved for X, Y, and Z by multiplying the result matrix
by the inverse of the coefficient matrix.










=




















′′′
′′′
′′′
Z
Y
X
L
K
J
IFC
HEB
GDA
Specifics regarding the inversion process are given in the comments for the
inversion routine, I.

HP 33S Specifications

General

Type	Scientific
Form factor	Pocket
Product color	Silver
Digits	10 digits
Display number of lines	2 lines
Keyboard type	Alphanumeric
Menus and prompts	Yes

Weight and Dimensions

Dimensions (WxDxH)	157 x 16 x 81 mm