Finding The Cross Product; Finding The Dot Product; Matrices - HP -28S Manual

Finding the Cross Product
Find the cross product of the vector in level 1 with the vector
[2 - 2 1]. (The cross product is defined only for two- and three-
element vectors.)
Key in the vector.
[I]
2,-2,1
2:
1:
[ 16 -11 -18 ]
[2, -2,10
Calculate the cross product, using CROSS in the third row of the AR-
1
ARRAY
II
NEXT
II
NEXT
I
CROSS
Finding the Dot Product
3:
2:
1 :
[ - 47 -
52 -
10 ]
wm!IIDDllDJIl:IBmImmmD
Find the dot product of the vector in level 1 with the vector [5 7 2].
(The two vectors must have the same number of elements.)
Key in the vector.
[I]
5,7,2
Calculate the dot product.
DOT
Matrices
2:
1 :
[ - 47 -
52 - 10 ]
[5,7,20
wm!IIDDllDJIl:IBmImmmD
3:
2:
1:
-619
wm!IIDDllDJIl:IBmImmmD
This section describes how to invert a matrix and how to find the
determinant of a matrix. Both of these calculations are restricted to
square
matrices-those with the same number of rows as columns.
126
11: Vectors and Matrices