If A=<6,4,1> and B=<2,9,3>, what is AB||A||||B||?

1 Answer
May 24, 2016

With the given data we start,

AB=<62,(4)(9),(1)3>

AB=<+12,+36,3>

AB=45

||A||=62+(4)2+(1)2

||A||=36+16+1

||A||=53

||A||7.28

||B||=22+(9)2+32

||B||=94

||B||9.70

Now lets plug in values

AB||A||||B||=45(7.28)(9.70)

AB||A||||B||=4570.616

AB||A||||B||=25.616