If vec(A), vec(B), vec(C) represents the three sides of an equilateral triangle taken in the same order then find the angle between (i) vec(A) and vec(B) (ii) vec(B) and vec(C) (iii) vec(A) and vec(C).

If vec(A), vec(B), vec(C) represents the three sides of an equilateral

1.	If vec(A), vec(B), vec(C) represents the three sides of an equilateral triangle taken in the same order then find the angle between (i) vec(A) and vec(B) (ii) vec(B) and vec(C) (iii) vec(A) and vec(C).
Answer» Solution :From the diagram the ANGLE between the vectors `VEC(A)` and `vec(B)` is `120^(@)`, the angle between `vec(B)` and `vec(C)` is `120^(@)`, the angle between `vec(A)` and `vec(C)` is `120^(@)`