某气象仪器研究所按以下方案测试一种“弹射型”气象观测仪器的垂直弹射高度:A、B、C三地位于同一水平面上,在C处进行该仪器的垂直弹射,观测点A、B两地相距100米,
,BC的距离比AC短40米.A地测得该仪器弹至最高点H时的仰角为30°.
(2)求该仪器的垂直弹射高度CH.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.png)
(2)求该仪器的垂直弹射高度CH.
更新时间:2023-08-30 09:21:28
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【推荐1】在
中,角
、
、
所对的边分别为
、
、
,且
.
(1)求角
的大小;
(2)若
,
的面积为
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6f71e83ba389fc24bea140cf56abc85.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】设
的角
所对边的长分别为
,且
.
(1)求角
的大小;
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5ca4d7d1d053fd046a280ace4447232.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/838869164f73c211c0eb4a7c60091682.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da47c5337154503494cb94011273cc5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐1】如图,测量河对岸的塔高AB时,可以选与塔底B在同一水平面内的两个测点C与
现测得
,
,
米,又在点C测得塔顶A的仰角为
,求塔高AB.
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【推荐2】在地面某点
处测得山顶
的仰角为
,沿
方向前进3千米至点
处,测得山顶的仰角为
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千米至
处,测得山顶
的仰角为
,(三个测量点都在山的同一侧,且在一条直线上),求
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.
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