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)
更新时间:2023-01-26 13:45:10
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【推荐2】如图,已知∠AOD=90°,OC平分∠BOD,∠AOB与∠BOC的度数的比是4︰7
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(1)求∠AOB的度数.
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【推荐1】如图,在月港有甲、乙两艘渔船,若甲渔船沿北偏东60°方向以每小时8海里的速度前进,乙渔船沿南偏东30°方向以每小时15海里的速度前进,两小时后,甲船到达M岛,乙船到达P岛.求P岛与M岛之间的距离.
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【推荐2】如图,一艘轮船从小岛
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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【推荐1】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
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,
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)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](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)
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【推荐2】在
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(2)已知
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![](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)
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![](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)
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【推荐1】如图所示,一轮船由西向东航行,在A处测得小岛P在北偏东75°的方向上,轮船行驶40海里后到达B处,此时测得小岛P在北偏东60°的方向上.
(2)已知小岛周围22海里内有暗礁,若轮船仍向前航行,有无触礁的危险.
(2)已知小岛周围22海里内有暗礁,若轮船仍向前航行,有无触礁的危险.
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【推荐2】如图,某船向正东方向航行,在A处望见某岛C在北偏东60°方向,前进6海里到B点,测得该岛在北偏东30°方向.已知该岛周围6海里内有暗礁,若该船继续向东航行,有无触礁危险?请说明理由.(参考数据:
≈1.732)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
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