
#1
Sep1612, 12:35 PM

P: 77

1. The problem statement, all variables and given/known data
Calculate the cross product assuming that u X w = <7,1,8> Find (3u + 4w) X w = ? 2. Relevant equations I'm not sure. I know you have to relate the cross product to something inorder to find what u and w are, but don't know what equations to use. 3. The attempt at a solution Don't know where to start 



#2
Sep1612, 01:17 PM

P: 54

I think it is best if you use these 3 characteristics.
1. u x w = u w sin(theta) 2. λu x w = λ (u x w) 3. (u + v) x w= u x w + v x w 


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