Note that for any 2 vectors a,b: -a x b = -(a x b). This reduces the problem to -(i x i).
Now what is the vector product of a vector with itself?
#3
Ry122
565
2
well can you tell me how the projection of u on to v
where
u=-i+2j and v=i+2j is
v=(3/5)i+(6/5)j ?
The answer i got was (4/5)i + (8/5)j
i used the equation
w=v.((u.v)/(modulusv^2))