某国飞机失事坠入大海,该国立即派出一艘海上搜救船前往飞机失事海域进行打捞.在失事海域的
点处仪器测得俯角为
正前方的海底
点处有黑匣子,沿同一方向继续航行
米到
点处,测得正前方
点处的俯角为
.求失事飞机的黑匣子离海面距离,(结果保留根号)(参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4abb59695562b3a1295a251dc97da700.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/68a4c9b697e3df2b5469b71d3b5e47a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d04edb68132247702a679438dccb3ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e16e74b1e197515917de6bcfdb6b0859.png)
![](https://img.xkw.com/dksih/QBM/2020/4/21/2451289036947456/2456065134977024/STEM/bfb3e282-46c2-478e-8762-3081e568fd6a.png)
2019·安徽合肥·二模 查看更多[1]
更新时间:2020-05-05 11:00:13
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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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解答题-问答题
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【推荐1】如图,小明在A处看见前面山上有个气象站,仰角为30° ,当笔直向山的方向前进4千米后,小明看气象站的仰角为60°,你能算处这个气象站离地面的高度CD吗?是多少?
![](https://img.xkw.com/dksih/QBM/2022/1/14/2894350213365760/2951469899235328/STEM/29e6e81e-411f-44d3-8ab4-be8fd6d92460.png?resizew=256)
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解答题-应用题
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较易
(0.85)
【推荐2】图1是某住宅单元楼的人脸识别系统(整个头部需在摄像头视角范围内才能被识别),其示意图如图2,摄像头A 的仰角、俯角均为
,摄像头高度
,识别的最远水平距离
.
的点G 处,恰好能被识别(头的顶部在仰角线
), 求张亮的身高约是多少厘米;
(2)夕夕身高
,头部高度为
,踮起脚尖可以增高
,此时夕夕能被识别吗?请计算说明.(精确到
,参考数据:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76c12e76fbd84eeec721386bd3b04cc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a157dec24cbabfa0930edfd74074ca67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62396e0e87ed5b569313890c9d2056d2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e651babde701d43faadf589dd4e14c72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)夕夕身高
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a62a628cff2d3c2d3d487e6a0d5861b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff748d864eeeefef79124c297c0675c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/976260cbf5e30856d4fd37a4b0a671a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5dd58f9f2603b2a02db40ca2bf9d17a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb3abad57afe08675931f93ecd88398a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66b695eff1eceaf23fa694a871bcf8db.png)
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