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（1）∵山坡AC的坡度i=1：1，∴tanα= CD AD =1，∴α=45°，（2）设CD=x，∵∠BAD=60°，AD=BD，∴tan60°= BC+BD AD = 60+x x = 3 ，解得：x=30（ ...
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题目：如图，山顶上有一座电视发射塔，在山脚点A处测得塔顶B的仰角∠BAD=60°．已知发射塔BC高为60米，山坡AC的坡度i=1：1．（提示：坡面的铅直高度与水平宽度的比称为坡度）（1）求山坡AC
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