Linear Algebre HELP!

[5060Jon]

could someone please explain how to solve this, I obviously tried the "simple" solution which apparently isnt right. Thanks

 

[Deleted member 4993]

View attachment 24687

could someone please explain how to solve this, I obviously tried the "simple" solution which apparently isnt right. Thanks

Use cos(Θ) = (u•v)/[|u|*|v|]

Please show us what you have tried and exactly where you are stuck.

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Please share your work/thoughts about this problem.

 

[pka]

Can you expand this dot product, \(\large (2\vec{u}-\vec{v})\cdot(2\vec{u}-\vec{v})~?\)

 

[5060Jon]

Thank you