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4 The height of a building is 72 m Find the angle of elevation from a point on ground level that is 55 m away

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4 The height of a building is 72 m Find the angle of elevation from a point on ground level that is 55 m away from the base of the building 5 From a boat 160 m out at sea the angle of elevation to the coast is 18 The angle of elevation to the top of a lighthouse on the coast is 22 a Draw a diagram representing the situation b Find the height of the lighthouse

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