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

Explanation

To find the angle between two vectors we connect the tails of the two vectors. We can shift `vec(B) & vec(C )` such that tails of `vecA, vecB, and vecC` are connected as shown in figure.

Now we can easily observe that angle between `vecA and vecB" is "60^@, vecB and vecC` is `15^@` and between `vecA` and `vecC` is `75^(@)`.