Mathematics
From the top of a light house, it is observed that a ship is sailing directly towards it and the angle of depression of the ship changes from 30° to 45° in 10 minutes. Assuming that the ship is sailing with uniform speed; calculate in how much more time (in minutes) will the ship reach the light house ?
Related Questions
If (2 cos 2A - 1)(tan 3A - 1) = 0; find all possible values of A.
A 20 m high vertical pole and a vertical tower are on the same level ground in such a way that the angle of elevation of the top of the tower, as seen from the foot of the pole, is 60° and the angle of elevation of the top of the pole, as seen from the foot of tower is 30°. Find :
(i) the height of the tower;
(ii) the horizontal distance between the pole and the tower.