如图,将一个Rt△ABC形状的楔子从木桩的底点P沿水平方向打入木桩底下,使木桩向上移动.已知楔子斜面的倾斜角为15°,若楔子沿水平方向前进6cm(如箭头所示),则木桩上升了 _____ .(结果可含有三角函数)
![](https://img.xkw.com/dksih/QBM/2022/1/23/2900438718791680/3025061500215296/STEM/b0611fd542f44c798bb1d6100f896a2e.png?resizew=384)
更新时间:2022-07-18 08:46:17
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【知识点】 仰角俯角问题(解直角三角形的应用)
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【推荐1】如图,
为地面上一点,测得点
到树底部
的距离为
米,在点
处放置一个
米高的测角仪
,并测得树顶
的仰角为
,则树高
约为________ 米(精确到
米).
(参考数据:
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f43677db00ba65a7f96fc49627d70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/999db426641d3b41999d305d0027b3f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2466cd4f7db939faf82172df7040b16a.png)
(参考数据:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e799a65d189456adebf2842285221f74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f19a75bbacd836e4bf42b09e9f128c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abe9e750c3be56ed2faa7586871b7058.png)
![](https://img.xkw.com/dksih/QBM/2018/11/7/2070497794875392/2071122925494272/STEM/380232e95eaa4639994ef4373f87a23e.png?resizew=80)
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【推荐2】在一艘船上看海岸上高42米的灯塔顶部的仰角为30度,船离海岸线_____ 米.
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