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Three vectors vecA , vecB , vecC a...

Three vectors ` vecA , vecB , vecC ` are shown in the figure angle between (i) ` vecA and vecB (ii) vecB and vecC ,(iii) vecA and vecC`

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To find the angle between two vectors we connect the tails of the two vectors. We can shift the vectors parallel to themselves such that tails of A,B and C are connected as shown in figure.

Now we observe that angle_between A and B is 60°, B and C is 15° and between A and C is 75°
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