I have been lost in this forever due to missing the lecture, but does anybody know how to do this? Thank you for the help if you can.

a=3.0i+3.0j-2.0k

b=-1.0i-4.0j+2.0k

c=2.0i+2.0j+1.0k

The question is: a(dot)(axb)=?

Any help would be appreciated.

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- Sep 9th 2008, 07:30 PMElite_Guard89Dot and Scalar Product
I have been lost in this forever due to missing the lecture, but does anybody know how to do this? Thank you for the help if you can.

a=3.0i+3.0j-2.0k

b=-1.0i-4.0j+2.0k

c=2.0i+2.0j+1.0k

The question is: a(dot)(axb)=?

Any help would be appreciated. - Sep 9th 2008, 07:35 PMChris L T521
- Sep 9th 2008, 07:42 PMElite_Guard89
Okay, then how would you do a(dot)(b+c)?

- Sep 9th 2008, 07:43 PMo_O
Add the vectors

**b**and**c**to get**b**+**c**. Then take the dot product of**a**and what you found? - Sep 9th 2008, 07:50 PMElite_Guard89
I understand the b+c part, but I'm not sure on how you find the dot product of a and what (b+c) creates.

- Sep 9th 2008, 07:54 PMChris L T521
- Sep 9th 2008, 07:55 PMo_O
Why not?

So:

Surely you can take the dot product of two vectors? - Sep 9th 2008, 08:00 PMElite_Guard89
I would if I knew what a dot product was lol.

- Sep 9th 2008, 08:03 PMChris L T521