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d 4
d 4444 Qd4
4
O
4d
4
d
¡
4
d
¡4
d
¡4
¡ ¡
¡
d
d d d P d L
4 4
4 4 M 44
4
4D 4 4 4 Ey x
where n =
ˆ
Hence 1
PQ E P Q is a unit vector which is orthogonal to X and Y .
n = t(X × Y ),
ˆ where t = ±1/X × Y . Hence E  AB ·(X × Y )
PQ =
.
X × Y 
17. We use the formula of the previous question.
Line L has the equation P = A + sX , where 2
E
X =AC = −3 .
3
Line M has the equation Q = B + tY , where 1
E
Y =BD= 1 .
1 Hence X × Y = [−6, 1, 5]t and X × Y  = 95 √
62. 4 ...
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This note was uploaded on 12/19/2011 for the course MAS 3105 taught by Professor Dreibelbis during the Fall '10 term at UNF.
 Fall '10
 Dreibelbis

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