If `vec(A)=vec(B)+vec(C )`, and the magnitudes of `vec(A)`,`vec(B)`,`vec(C )` are 5,4, and 3 units, then the angle between `vec(A)` and `vec(C )` is

Explanation

Since ` vec A^(2) + vec B^(@) = vec c^(@), therfore angle between ` vec A + vec B ` is 90^(@).Let `theta` be the angle between ` vec A and vec C`, then , ` cos theta =3//5 or theta = cos^(-1) (3//5)`