名校
1 . 如图,在离地面
的热气球
上,观察到山顶
处的仰角为
,在山脚
处观察到山顶
处的仰角为60°,若
到热气球的距离
,山的高度
,
,则
( )
![](https://img.xkw.com/dksih/QBM/2020/12/10/2611381506154496/2613331006668800/STEM/823e9f3ec7214f459514b1dbf4992781.png?resizew=232)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eabd5f3a86afe49dcd70571e2b96cfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83cb1fe8a07e206980ccf35c8755dbed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efea2f51e95fb146f4a048bed31bd8c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49978c7ee01ea96e024b0bb6281a3da0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
![](https://img.xkw.com/dksih/QBM/2020/12/10/2611381506154496/2613331006668800/STEM/823e9f3ec7214f459514b1dbf4992781.png?resizew=232)
A.30° | B.25° | C.20° | D.15° |
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2020-12-13更新
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8卷引用:河南省名校联盟2020-2021学年高三11月联考数学试题
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