A stone is thrown with an angle of elevation and a speed u from the top of a tower which has a height h. A moment later, the ball hits the ground and the point of impact is at a horizontal distance d from the bottom of tower. Show that the elevation angle satisfies the equation (d^2 )g tan^2( )+p tan + q = 0, where g is the gravitational acceleration, p and q are functions of the given parameters. Find p and