Vector A extends from the origin to a point having position coordinates represented in different way like $(7,{70}^{\circ })$ and vector B extends from the origin to a point having position coordinates in different way like $(4,{100}^{\circ })$ and both are in XY plane. Find    area of triangle formed by $\overline{A}\overline{B}$ vectors as adjacent sides. (given angle in the co ordinates it is with positive x – axis)