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Will someone please do this maths problem for me?

eoinoneill91 · 2011-07-05 15:59:01

Consider the vectors u = 6i + 2j − 1k and v = 3i + 2j − k. i. Calculate (u × v).u. ii. What does your answer to part (i) tell you about the vectors u and u ×v? iii. What is the angle between the vectors u and v? I have almost every other aspect of Linear Algebra down but this is driving me mad. Thanks.

05-07-2011 3:59pm

#1

eoinoneill91

Closed Accounts Posts: 21 ✭

Join Date: June 2011

Posts: 16

Consider the vectors u = 6i + 2j − 1k and v = 3i + 2j − k.

i. Calculate (u × v).u.
ii. What does your answer to part (i) tell you about the vectors u and u ×v?
iii. What is the angle between the vectors u and v?

I have almost every other aspect of Linear Algebra down but this is driving me mad. Thanks.

0

Comments

#2 05-07-2011 4:49pm

[Deleted User]
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Nobodies going to do it for you. They'll help you in the maths forum but you'll only be given tips on how to work it out yourself

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#3 05-07-2011 11:40pm

Pudsy33

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its the dot product and cross product. google them, it'll help

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#4 06-07-2011 11:24am

eoinoneill91

Closed Accounts Posts: 21 ✭

Join Date: June 2011

Posts: 16

Yep, have it now. Thanks for the tips!

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