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如图,山顶上有一座铁塔,在地面上一点A处测得塔顶B处的仰角α=60°,在山顶C处...
如图,山顶上有一座铁塔,在地面上一点A处测得塔顶B处的仰角α=60°,在山顶C处测得A点的俯角β=45°,已知塔高为50m,则山高CD等于( )
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000002233415219/SYS201311030000022334152005_ST/images0.png)
A.25(1+
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)m
B.25(
![manfen5.com 满分网](http://img.manfen5.com/res/CZSX/web/STSource/20131103000002233415219/SYS201311030000022334152005_ST/1.png)
-1)m
C.25m
D.(25
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+1)m
考点分析:
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