Question: Let a and b be two 4-dimensional vectors: a = (2,5,- 2.6,6) and b = (15,2.5,4,4) (A) What is ||ab||? (B) What is ||ab||?

Let a and b be two 4-dimensional vectors: a = (2,5,- 2.6,6)

Let a and b be two 4-dimensional vectors: a = (2,5,- 2.6,6) and b = (15,2.5,4,4) (A) What is ||ab||? (B) What is ||ab||? (C) What is the cosine of the angle between a and b?

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