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Problem involving dot and cross product

Answers and Replies

  • #2
Student100
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Homework Statement



https://www.dropbox.com/s/8l90hahznjlv9d0/vector problem.png?dl=0

Homework Equations



Dot and Cross product

The Attempt at a Solution



although I know the dot and cross product, I'm not sure what I'm being asked or how to proceed? any help?[/B]
Have you tried to turn it into a concrete example than generalizing it?

The problem wants you to find a dot b and a cross b then use them to show the equation for a.
 
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  • #3
haruspex
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Do as the steps ask.
In (a), take the dot product with ##\vec a## on each side of the given equation. What equation results? Then get that equation into the form ##\vec a.\vec b =##.

The note at the end has a typo. Are you familiar with the equation that was intended?
 

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