Question: ( 5 points ) Given two vectors A = i + j and B = 3 i j , find: ( a ) A B

(5 points) Given two vectors A =i +j and B =3i j, find:
(a) A B,
(b)|A B|,
(c) the angle between A and B,
(d) the angle between A B and vector C =i +k.

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