1 . 如图,小明同学在山顶A处观测到一辆汽车在一条水平的公路上沿直线匀速行驶,小明在A处测得公路上B,C两点的俯角分别为
,
,且
.若山高
m,汽车从C点到B点历时25s,则这辆汽车的速度为______
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/702f3bab242d53b8fbcb9fde925953b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b73a7c3f5045c0c228a5acb078c49007.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53afeaf21f93091b71608d21540be239.png)
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2023-07-21更新
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3卷引用:青海省西宁市大通回族土族自治县2022-2023学年高一下学期期末联考数学试题