LEM and b have a 0 68 angle between them The magnitude length of a is 142 and the magnitude of bis 207 We can write this as la

Question

LEM and b have a 0 68 angle between them The magnitude length of a is 142 and the magnitude of bis 207 We can write this as la 142 and 6 207 See Diagrams gmtobuz a Find la bl This means what is the magnitude of the sum of the two vectors Hint Law of Cosines 3 marks 68 b doing two tony 30 igen auli no id TB b a b b What angle does a b make with a Shown as on the diagram 3 marks Note this angle is NOT half of 68 To find this you will need to use the Law of Cosines or Law of Sines

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