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| 1. |
Q: From the peak of a hill which is 300m high, the angle of depression of two sides of a bridge lying on a ground are 45° and 30° (both ends of the bridge are on the same side of the hill). Then the length of the bridge is |
| A. | 300√3 m |
| B. | $${300\over√3}m $$ |
| C. | 300(√3-1) m |
| D. | 300(√3+1) m |
| Answer» D. 300(√3+1) m | |