1 . 如图,一艘海轮位于灯塔
的北偏东
方向,距离灯塔
海里的
岛,它沿正南方向航行一段时间后,到达位于灯塔
的东南方向上的
岛,求
、
两岛之间的距离.(结果保留整数)【参考数据:
,
,
】
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2931e9bcd1cd5280d783ed6dda4ca38.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90dd550e1ad9bbf01687ffb4aab788ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.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/44d1950507c3bbc3e796089c97f71711.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f5e4a82905a21bb7bae8829bdc4f91a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44bf3c92255b0d8feff453129d70ab17.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/28/5a8361f3-043b-4342-b1c7-8287ac69c26f.png?resizew=131)
您最近一年使用:0次
2023-01-26更新
|
625次组卷
|
5卷引用:吉林省长春市宽城区第四十八中学2022-2023学年九年级上学期10月月考数学试题
2 . 在
中,
,
分别是
,
,
的对边.
(1)已知
,
,求
;
(2)已知
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3d2eae98e1683fbb9533584450dd696.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febc9a89d0d1c97b88c0f4acd32b4e67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/194741f4d2ae7ee44cafca780361446a.png)
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acd42bba91abccfc6ee092da37959ca0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/218d32147e3fed0b5226308249e7aa4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3818a2c9919d358b4c3713396093822b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9981f895794d7f9dcff5dd467ad11390.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e89de84dafcef8f83b2d03a241d2dad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
您最近一年使用:0次
2022-10-31更新
|
375次组卷
|
3卷引用:江苏省苏州市苏州高新区第一初级中学校2022-2023学年九年级上学期10月月考数学试题
江苏省苏州市苏州高新区第一初级中学校2022-2023学年九年级上学期10月月考数学试题(已下线)第7章 锐角三角函数(基础、典型、易错、压轴)分类专项训练-2022-2023学年九年级数学考试满分全攻略(苏科版)28.1 锐角三角函数课后作业B层
名校
3 . 汉书《淮南万毕术》记载:取大境高悬,置水盆于下,则见四邻.如图1,这句话是说,利用高挂上面的镜子所成的像,再反射到水盆中,借此观察院墙外景象.相关光的路径和围墙等,用几何图形表示如图2,已知点
,
,
,
在同一条水平线上,点
在围墙
的正上方,
于点
,
于点
,
,
,
米,
,求点
到墙脚
的距离.(结果精确到
米.参考数据:
,
,
,
,
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee50a23604ea2a9c1f3649dab97c2e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e4d69a2102d3bf47a274008461743a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/935c14c52877f3185ed96e92222d4698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39b31033878d7dbb8b19a991d7381b7e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/385f8ed2ee50d16bfa7001bc794c65e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe88ca2dcbe8e1c55495acd1c50456db.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a87796ee30e6c5d5e6b6285b32abe10c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b517a427e371f90ced3cccce3abb26af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/589dfa98a450567b33b0f96b4c16d00e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/055ed3df1b9f8e8267f73e291e7e3356.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/205f7667ee4d148aa970cfcd0ee5a334.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20f65a9d9da141b688efadf621dd107b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460317e7c26f95b9b29cfe1a89b796d6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/20/3b548a3d-44fe-4c35-98e1-edd42ebde486.jpg?resizew=393)
您最近一年使用:0次
2021-05-10更新
|
492次组卷
|
6卷引用:2021年湖北省恩施市九年级数学中考第一次适应性考试题
4 . 求下列直角三角形中字母所表示的值.
![](https://img.xkw.com/dksih/QBM/2019/12/16/2356430033895424/2356458203987968/STEM/822c79cf49024c00a421349319724672.png?resizew=368)
您最近一年使用:0次