Answer Happy

Using the definition of the scalar product, find the angle between the following vectors. (Find the smallest nonnegative angle.) (a) A = 8î – 4ſ and B = = 5î – 5ġ = o (b) A = -3î + 5ġ and B = = 39 – 4ſ + 2 (c) A = î -2ſ + 2k and B = 3ſ + 4 o