If a flag staff subtends the same angles at the points A,B,C and D on the horizontal plane through its foot, the points A,B,C and D from a

A flag staff of the height (a-b) stands on the top of a tower subtends the same angle at the point on the horizontal plalne through the foot of the tower which are at distant a and b from the tower. The height of the tower is

10. The upper (3)/(4) portion of a vertical pole subtends an angle tan ^(-1)((3)/(5)) at the point in the horizontal plane through its foot.The tangent of the angle subtended by the pole at the same point is

10. The upper 3/4 portion of a vertical pole subtends an angle tan^-1(3/5) at the point in the horizontal plane through its foot. The tangent of the angle subtended by the pole at the same point is

The upper 3/4th portion of a vertical pole subtends an angle tan^(-1)(3/5) at the point in the horizont plane through its foot. The tangent of the angle subtended by the pole at the same points is