1 . 如图所示,在河对岸有两座垂直于地面的高塔
和
.张明在只有量角器(可以测量从测量人出发的两条射线的夹角)和直尺(可测量步行可抵达的两点之间的直线距离)的条件下,为了计算塔
的高度,他在点A测得点
的仰角为
,
,又选择了相距100米的
点,测得
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/239a24e7-8ffe-44a1-a1c5-02be15106643.png?resizew=168)
(1)请你根据张明的测量数据求出塔
高度;
(2)在完成(1)的任务后,张明测得
,并且又选择性地测量了两个角的大小(设为
、
).据此,他计算出了两塔顶之间的距离
.
请问:①张明又测量了哪两个角?(写出一种测量方案即可)
②他是如何用
表示出
的?(写出过程和结论)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ac09dc1ca2cdd7aef28c218763d3e4d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78a439c8ebe2f8f158683b51919644ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05740f0c6071846227dc0ec177ad15e8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/239a24e7-8ffe-44a1-a1c5-02be15106643.png?resizew=168)
(1)请你根据张明的测量数据求出塔
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)在完成(1)的任务后,张明测得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7bd60a2972e9dd5e3ba90d6b2639586.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
请问:①张明又测量了哪两个角?(写出一种测量方案即可)
②他是如何用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d004d2d115b477ade6af7ddb93db0df8.png)
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2 . 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:在
处(点
在水平地面
的下方,
为
与水平地面
的交点)进行该仪器的垂直弹射,水平地面上两个观察点
,
两地相距100米,
,其中
到
的距离比
到
的距离远40米.
地测得该仪器在
处的俯角为
,
地测得最高点
的仰角为
,则该仪器的垂直弹射高度
为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/4bb40cb5-81b4-4e4e-ba5c-c37c3690d832.png?resizew=159)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc83f34b5a3c1dc09d990ce4bdc8e078.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc83f34b5a3c1dc09d990ce4bdc8e078.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b57fdd2a3642716fcf5100011eb3ec88.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/7f9e8449aad35c5d840a3395ea86df6d.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f57de3913b6d57ce5dd0732d2ce4ccd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/273fdc424073120fe6e6380aa4f9102c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6655e2fa64a32cd12fe0279afd65d73.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/4bb40cb5-81b4-4e4e-ba5c-c37c3690d832.png?resizew=159)
A.210米 | B.![]() | C.![]() | D.420米 |
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2021-06-20更新
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7卷引用:专题6.4 正弦定理、余弦定理的应用(讲)- 2022年高考数学一轮复习讲练测(新教材新高考)
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