A tower subtends an angle `alpha` at a point A in the plane of its base and the angle of depression of the foot of the tower at a point b ft just above A is `beta`. Then the height of the tower is

A tower subtends an angle alpha at a point A in the plane of its base and the angle of depression of the foot of the tower at a point b ft hust above A is beta . Then the height of the tower is

A tower subtends an angle alpha at a point in the plane of its base and the angle of depression of the foot of the tower at a point b ft. just above A is beta . Then , height of the tower is

A tower subtends an angle alpha at a point A in the plane of its base and the angle of depression of the foot of the tower at a point b metres just above A is beta .Prove that the height of the tower is b tan alpha cot beta .

A tower subtends an angle alpha at a point A in the plane of its base and angle of depression of the foot of the tower at a point l metres just above A is beta . Prove that the height of the tower is l tan alpha cot beta .

A tower subtends an angle alpha at a point A in the plane of its base and the angle of depression of the foot of the tower at a point b metres just above A is beta . Prove that the height of the tower is btanalphacotbeta .

A tower subtends and angle 60^(@) at a point A in the plane of its base and the angle of depression of the foot of the tower at a point 10 meters just above A is 30^(@). The height of the tower is