Online resources for dot product calculations?

• Mar 25th 2013, 04:21 AM
Splint
Online resources for dot product calculations?
Can someone please share a link to a site which can show me how to calculate the following:

Given 3 vectors A,B and C, calculate the following:
A.B
Theta AB
2B.3C
2(B.3C)

Which of the following can be calculated:
A.B.C
A.(B.C)
A.(B+C)
3.A

Calculate:
V1.V1 (dot product of a vector with itself)
If V1 and V2 are perpendicular, calculate V1 .V 2
If V1 and V2 are parallel, calculate V 1 .V2

I know a lot of this stuff is fairly straight forward but I'm having trouble finding information about the correct methods to calculate what's asked and the provided course materials are very incomplete.

Thanks
Splint
• Mar 25th 2013, 04:24 AM
Prove It
Re: Online resources for dot product calculations?
Dot products are incredibly easy. Multiply the corresponding elements of each vector, then add them all together. You should get a scalar as the answer, which is why the dot product is sometimes called the scalar product.
• Mar 25th 2013, 04:36 AM
Splint
Re: Online resources for dot product calculations?
From what I've seen so far, yes you are quiet correct. I did however attempt a number of them without seeing a worked example and some how got it wrong. I would like to see some worked examples rather than do the online test based on guess work alone.
• Mar 25th 2013, 04:57 AM
Prove It
Re: Online resources for dot product calculations?
Well why not post what you have tried here and we'll see where you have gone wrong.
• Mar 26th 2013, 04:27 AM
Splint
Re: Online resources for dot product calculations?
Thanks for you input Prove It, I did abit of searching around and was able to answer all questions correctly.

Cheers
Splint