From the top of a 9 metres high building AB, the angle of elevation of the top of a tower CD is 30 and the angle of depression of the foot of the tower is 60 What is the height of the tower

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From the top of a 9 metres high building AB, the angle of elevation of the top of a tower CD is 30 and the

From the top of a 9 metres high building AB, the angle of elevation of the top of a tower CD is 30º and the angle of depression of the foot of the tower is 60º. What is the height of the tower?

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