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 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 ft just 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 ft hust 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 just above A is beta . Then, the height of the tower is : a) b tanalphacot beta b) bcotalphatanbeta c) bcotalphacotbeta d) btanalphatanbeta