http://img84.imageshack.us/img84/1594/16233805.jpg

I'm not sure how to do part a) and b). For a) I don't get how the hint helps.

Eg, I did and we know that a.b = 0 but there are no dot products in the former equation...

Cheers!

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- April 4th 2011, 11:29 AMusagi_killerOrthogonal vectors
http://img84.imageshack.us/img84/1594/16233805.jpg

I'm not sure how to do part a) and b). For a) I don't get how the hint helps.

Eg, I did and we know that a.b = 0 but there are no dot products in the former equation...

Cheers! - April 4th 2011, 12:25 PMOpalg