在气象台
正西方向
处有一台风中心
,它正向东北方向移动,移动速度的大小为
,距台风中心
以内的地区都将受到影响.
所在地是否会受到台风的影响?如果会,大约多长时间后受到影响?持续时间有多长?(参考数据:
)
(2)台风对气象台
的影响从开始到结束,线段
扫过的面积是多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f69e03c1a32bbb2056a5e4e3d872295.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7822b217ea4ee15ff83d5ba429f8f6cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd054da0ad34c8ba01fe54179ba0a7c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0f85e62b60cf10d4f6a8a366f4765d8.png)
(2)台风对气象台
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
23-24高一下·云南昆明·期中 查看更多[2]
更新时间:2024-05-06 08:22:49
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相似题推荐
【推荐1】已知a,b,c分别为
内角A,B,C的对边,已知
若
还满足下列两个条件中的一个:①
;②
.请从①②中选择一个条件,完成下列问题.我选择___________(填①或者②).
(1)求
;
(2)求对应
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d701179715510533cd7b0496347e3004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc4403d2ba19f8dc79b8366f7b1a3dc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e190301173d3336d2b8f31eee5b9f7bd.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)求对应
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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【推荐2】如图所示,某镇有一块空地
,其中
,
,
.当地政府计划将这块空地改造成一个旅游景点,拟在中间挖一个人工湖
,其中
,
都在边
上,且
,挖出的泥土堆放在
地带上形成假山,剩下的
地带开设儿童游乐场.设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/1169cc72-0651-4f12-911b-94801ab39879.png?resizew=125)
(1)求
的长(用
表示);
(2)为节省投入资金,人工湖
的面积要尽可能小,问如何设计施工方案,可使
的面积最小,最小面积是多少.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a29ac2834e2f2f1c32149fe31f107134.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac60c80d4e7a767b37931f6720d7ade6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9b0eb72986587ffecf87c22a224bcd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0edafce95aade0386bc0d78f679dcf47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/caf2b5e712b42f748a3c30bb5d160c18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fb35158a52a23a6e57ff890cef8c7cf.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/29/1169cc72-0651-4f12-911b-94801ab39879.png?resizew=125)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88e9f7d1272b7344346b58b660aa260a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
(2)为节省投入资金,人工湖
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25dd698d57d1cf239eb8752aecaaa4f4.png)
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解题方法
【推荐1】如图,
是东西方向的公路北侧的边缘线,某公司准备在
上的一点
的正北方向的
处建一仓库,设
,并在公路同侧建造边长为
的正方形无顶中转站
(其中边
在
上),现从仓库
向
和中转站分别修两条道路
,
,已知
,且
.
![](https://img.xkw.com/dksih/QBM/2020/8/11/2525782498238464/2539868475080704/STEM/837f7627016740f08f1fe5601c27897b.png?resizew=217)
(1)求
关于
的函数;
(2)如果中转站四周围墙造价为1万元
,两条道路造价为3万元
,问:该公司建中转站围墙和两条道路总造价
最低为多少?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.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/6d03e807439f265ac625eedcbad64e66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef3903b3c1a51663064fdedfbe3c943c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e42887d9bf31c1dd99f13c39e63c9ab9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf67486ca72d9d0e7cb83ebe04326cd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://img.xkw.com/dksih/QBM/2020/8/11/2525782498238464/2539868475080704/STEM/837f7627016740f08f1fe5601c27897b.png?resizew=217)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)如果中转站四周围墙造价为1万元
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355fe3d6107ed80ff49de68d3756fbe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/355fe3d6107ed80ff49de68d3756fbe1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
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【推荐2】如图,某快递小哥从
地出发,沿小路
以平均时速20公里/小时,送快件到
处,已知
(公里),
,
,
是等腰三角形,
.
处?
(2)快递小哥出发15分钟后,快递公司发现快件有重大问题,由于通讯不畅,公司只能派车沿大路
追赶,若汽车平均时速60公里/小时,问汽车能否先到达
处?(注:
,
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/722b4403b1cd40188f0bfd1098ec9095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11c85409e4c685f7dbadae2de3cf9a09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5112c3e82b495e9bd4a55198fd6b48a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39776e9158fb382a3de6eb1572bcf02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce1229ba36a93222692bf76be9695bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)快递小哥出发15分钟后,快递公司发现快件有重大问题,由于通讯不畅,公司只能派车沿大路
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/574cb9cf21957ecd10ca9bc36a1b0451.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52881be613aa404e553da30d8987cfad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47bb3f35e3db7c1f3a3dd3eb20151b5f.png)
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【推荐3】在直角
中,
,
,
为
的中点,
,
分别为线段
,
上异于
,
的动点,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/50b71764-02a4-4c5e-a985-cd442bd916e1.png?resizew=159)
(1)当
时,求
的长度;
(2)若
为
的中点,设
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27436da39b339873c7258301e4c04f87.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/f959709747004dcf4e9c84ad544dc65c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/18/50b71764-02a4-4c5e-a985-cd442bd916e1.png?resizew=159)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02f42ac4613fce3d7a400125fc4ec8eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a5f1641947153c80b987320885a2b57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b01a7e5181a277ef179dc83f1aabec95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44072a6e77439bb9694763fd3011fc02.png)
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【推荐1】某轮船以
海里/小时的速度航行,在
点测得海面上油井
在南偏东60度.轮船从
处向北航行30分钟后到达
处,测得油井
在南偏东15度,且
海里.轮船以相同的速度改为向东北方向再航行60分钟后到达
点.(
)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/902d239f-c299-43b1-a073-780d0c84a5c1.png?resizew=88)
(1)求轮船的速度
;
(2)求
两点的距离(精确到1海里).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ace91c4056a437037119bd834f6e2588.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9a7a5642a15fccb563ef748f2973fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/902d239f-c299-43b1-a073-780d0c84a5c1.png?resizew=88)
(1)求轮船的速度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be54e84508decfcce6d2fcbe6c8c1a92.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfaa712e64750e3e2843bae68ebad6d1.png)
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【推荐2】在海岸A处,发现北偏东45°方向,距离A处
的B处有一艘走私船,在A处北偏西75°的方向,距离A处
的C处的缉私船奉命以
的速度追截走私船.此时,走私船正以
的速度从B处向北偏东30°方向逃窜.
的长度;
(2)求
的大小;
(3)问缉私船沿北偏东多少度的方向能最快追上走私船?最快需要多长时间?参考数值:
,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c0a5ce8861827c3e167e045ca64d427e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92a81900f8a87dbaddd7a2beea0f50af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0327da6a3ea4f86030518c9246a8e343.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b0933dcd31fba7021ab2357944aada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8fabb884dc5f9609de491245463bbe9a.png)
(3)问缉私船沿北偏东多少度的方向能最快追上走私船?最快需要多长时间?参考数值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b7bb1dd9e1bb49e95ecc1eb09b17f37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff421393cf5973dbed11a21ad22926cc.png)
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