The angle of elevation of the top of a vertical tower from a point A on the ground is 60o. From a point B, 2 units of distance further away from the foot of the tower, the angle of elevation of the tower is 45o. Find the distance of A from the foot of the tower
-
A.
3 + (sqrt{3}) -
B.
5 + (sqrt{3}) -
C.
3 – (sqrt{3}) -
D.
1 -
E.
(sqrt{3}) – 1