Hi all, I am having trouble understanding inner products. Specifically, using inner products to find the angle between two vectors. Our lecturer has given an example, as follows;
(u,v)= 4u1v1 + u1v2 + u2v1 + u2v2, where u=(1,0) v=(0,1)
(u,v)=|u|.|v|cosθ
1=(√4)cosθ
θ=∏/3
Surely the angle between the two vectors is ∏/2? I can't understand why it is ∏/3.
(u,v)= 4u1v1 + u1v2 + u2v1 + u2v2, where u=(1,0) v=(0,1)
(u,v)=|u|.|v|cosθ
1=(√4)cosθ
θ=∏/3
Surely the angle between the two vectors is ∏/2? I can't understand why it is ∏/3.
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