Question: 6) Two vectors a and b have a 0 = 720 angle between them. The magnitude (length) of a is 146 and the magnitude of

6) Two vectors a and b have a 0 = 720 angle between them. The magnitude (length) of a is 146 and the magnitude of b is 207. (We can write this as lal = 146 and [b| = 207.) See Diagrams. 72" a. Find a + b . (This means, what is the magnitude of the sum of the two vectors). Hint: Law of Cosines. (3 marks) atb b. What angle does a + b make with b? (Shown as o on the diagram) (3 marks) Note, this angle is NOT half of 720. To find this you will need to use the Law of Cosines (or Law of Sines)

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