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| 1. |
A tower subtends an angle of 30° at a point on thesame level as the foot of tower. At a second pointh m high above the first, the depression of the footof tower is 60°. The horizont stance of the towerfrom the point is21.h cot 60°(2)--3一(1)hcot 60°3(4) h cot 30 |
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