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From the top of a 7 meter high building, the angle of elevation of the top of a cable tower is 60°

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From the top of a 7 meter high building, the angle of elevation of the top of a cable tower is 60° and the angle of depression of its foot is 45° . Determine the height of the tower

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Let AB be the 7-m high building and CD be the cable tower, 

We have,

So, the height of the tower is 19.12 m.

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