Points: 0 of 1 Suppose that v and w are unit vectors. If the angle between v and i is a and the angle between w and i is , use the idea of the dot product vw to prove the following equation. cos (a-) cos acos + sin asin Save Let 0 represent the angle between v and w. Write an equation which relates this angle to the vectors. Since these are unit vectors, the v] and [w factors can be omitted from this equation. cos 0=v W I. Write the i and j components of v in terms of a. Since it is a unit vestor, the [v] factor has been omitted. V= v=Ji+j