HP -225 Owner's Manual page 124

Scientific calculator
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Projection of One Vector on Another
The projection of vector vi{=x;i+y;j on vector v,=x,i+y,j has the
direction of v, and:
X% + YiY,
Length =
15
Iv,|
where |v,| is the length of v,.
Example: Find the projection of 6i+4j on 10i—2j.
y
(6,4)
1
1
I
!
V4
"
!
lll
,
X
'I
'
v
of v{ on v,
(10,—2)
Keys:
Display:
Description:
@(MoDES] {DG}
Sets Degrees mode.
10 [§(xCOO0RD]
~=10.0000
Stores x and y for v,.
2 (+] M(xCooRD]
»=-2.0000
B(ANGLE)
8=-11.2899
Calculates 6 for v,.
B(RADIUS]
r=108.1980
Calculates Iv,l.
1/x
0.0981
Calculates 1/1v,l.
@6@104®2
X1X7 +y1y2 = 52.
x52.0000
116
8: Additional Examples

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