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解题方法
1 . 某赛事公路自行车比赛赛道平面设计图为五边形
(如图所示),
为赛道,根据比赛需要,在赛道设计时需设计
两条服务通道(不考虑宽度),现测得:
,
,
千米,
千米.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/3851d52c-8fc5-49de-9512-cdb207a8018d.png?resizew=141)
(1)求服务通道
的长;
(2)如何设计才能使折线赛道
(即
)的长度最大?并求出最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9142a8490de14a87eda628ffa7e28982.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3210447c12ab32f16a833865fbe1ff6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97bde5efa645a4c1ed6874088400d6a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b496737614e6d3b823e5a28f245c4636.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1131430c226a030942cf7559aa313ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ffc2817fa590affb5a760a25dc65308.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bbae5604194d099901241272dc3bed3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/3851d52c-8fc5-49de-9512-cdb207a8018d.png?resizew=141)
(1)求服务通道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)如何设计才能使折线赛道
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97a9b32570d553161be04d13954e92a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9cfda5a702b4667cf789a826677a1e20.png)
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3卷引用:湖南省衡阳市2021-2022学年高一下学期期中数学试题
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2 . 为了美化环境,某公园欲将一块空地规划建成休闲草坪,休闲草坪的形状为如图所示的四边形
,已知
,
,
是以
为直角顶点的直角三角形.拟修建两条小路
、
(路的宽度忽略不计),沿路径
从
处到
处比沿路径
和
从
处到
处近
米.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/6f0b3df3-fbb4-4048-8134-095823e3bdcc.png?resizew=139)
(1)若
,求
的值和
的长度;
(2)设
与
交于点
,若
,现公园管理方为了建一个更大的圆形花坛,应该选择
的内切圆还是
的内切圆?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45233580092f1d2e3c166ec26a6424a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a54f9b4a06f1967cc381e3ebb472218.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67d822262ff00915910e5b87d81ad1ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d07ae0b4264da6a8812454ffd2f20d94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/6f0b3df3-fbb4-4048-8134-095823e3bdcc.png?resizew=139)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3565e9c55354622c65421ee4393a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c44ce799d9835933017b9cac05ed6077.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8419015c50f805216e1c95c2911f7d0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7ac5396c5ea442e0364b50c1db3d2da.png)
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3 . 在某片海域上,一艘海上护卫舰位于点A处,一艘货轮在点A东偏北15°方向的点
处行驶着,通过雷达监测,发现在点A北偏东30°方向且距离点A24海里处的点
处出现一艘海盗船,此时海盗船与货轮相距
海里,且护卫舰距离货轮比距离海盗船更近.
(2)护卫舰为确保货轮的安全,护卫舰开始以
海里/小时的速度追击海盗船,与此同时,海盗船开始以20海里/小时的速度沿着北偏西30°方向逃窜,求护卫舰能追捕到海盗船的最短时长以及最佳追击方向.
![](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/d86eb63a41f1c6ae8200dcb75c95aa07.png)
(2)护卫舰为确保货轮的安全,护卫舰开始以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/395424943f098d2c9a83d80039018429.png)
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8卷引用:湖南省百所学校2021-2022学年高一下学期期中联考数学试题
名校
4 . 现只有一把长为
的尺子,为了求得某小区草坪边缘
两点的距离
(
大于
),在草坪坛边缘找到点
与
,已知
,且
,测得
,
,
,则
( )
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965923684057088/2969116893888512/STEM/dabb202e-b6f2-47b3-befa-8945e3d36fac.png?resizew=103)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71a41641aa0d0e45a3c03d3d2c1196b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71a41641aa0d0e45a3c03d3d2c1196b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7fd2626e2dbdd1a04c8c26bf7d07e59.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a52f494cbf08cc613e5c9ab39d30c58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/344ec180a4e5f7b60d799b4014d5cc33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/536fad4de30cfc4673af716898cf7ea5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f358cd8c16e46a61adad2f4fc667af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c26a46e7879436d532af3f4b6e258a81.png)
![](https://img.xkw.com/dksih/QBM/2022/4/25/2965923684057088/2969116893888512/STEM/dabb202e-b6f2-47b3-befa-8945e3d36fac.png?resizew=103)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-04-30更新
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6卷引用:湖南省百所学校2021-2022学年高一下学期期中联考数学试题
湖南省百所学校2021-2022学年高一下学期期中联考数学试题新疆乌鲁木齐市第八中学2021-2022学年高一下学期期中考试数学试题(已下线)第05讲 正弦定理和余弦定理的应用 (精讲)-1(已下线)第05讲 正弦定理和余弦定理的应用 (高频考点—精讲)湖北省十堰市丹江口一中2021-2022学年高一下学期月考数学试题(已下线)6.4.3 第3课时 余弦定理、正弦定理应用举例【第二练】“上好三节课,做好三套题“高中数学素养晋级之路
5 . 如图,某轮船从海岛
出发沿正北方向航行,灯塔
在海岛
北偏西
的方向上,且与海岛
相距
,灯塔
在海岛
北偏东
的方向上,且与海岛
相距
,该轮船航行到
处时看到灯塔
在北偏西
的方向上.
![](https://img.xkw.com/dksih/QBM/2021/4/19/2703128454184960/2807089553784832/STEM/3b0c2cdcaf1d4b89a3c1928dc6fae54c.png?resizew=217)
(1)求
与海岛
的距离;
(2)求
与灯塔
的距离.
![](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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a4c9b697e3df2b5469b71d3b5e47a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21e3cf5909eb6c7345e4f10214a7881e.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/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ba119c832955442cbb246a19d88a8b8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1cde7aace5b888a1a1c26fb911e2f49.png)
![](https://img.xkw.com/dksih/QBM/2021/4/19/2703128454184960/2807089553784832/STEM/3b0c2cdcaf1d4b89a3c1928dc6fae54c.png?resizew=217)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
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2021-09-13更新
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6卷引用:湖南省邵阳市武冈市2021-2022学年高一下学期期中数学试题
6 . 为了测量B,C之间的距离,在河的南岸A,C处测量(测量工具:量角器、卷尺),如图所示.下面是四位同学所测得的数据记录,你认为不合理的有( )
![](https://img.xkw.com/dksih/QBM/2021/7/12/2762788838694912/2776622251106304/STEM/f9346a56-0585-4baf-b97c-2e24050df1b1.png?resizew=260)
![](https://img.xkw.com/dksih/QBM/2021/7/12/2762788838694912/2776622251106304/STEM/f9346a56-0585-4baf-b97c-2e24050df1b1.png?resizew=260)
A.![]() ![]() | B.![]() ![]() | C.![]() ![]() ![]() | D.![]() ![]() ![]() |
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2021-08-01更新
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5卷引用:湖南省长沙市宁乡市三校(宁乡七中、九中、十中)2021-2022学年高一下学期期中数学试题
湖南省长沙市宁乡市三校(宁乡七中、九中、十中)2021-2022学年高一下学期期中数学试题湖南省湘西自治州2020-2021学年高一下学期期末数学试题(已下线)第05讲 正弦定理和余弦定理的应用 (精练)-2023年高考数学一轮复习讲练测(新教材新高考)1.6.3解三角形应用举例(已下线)2.6.1余弦定理与正弦定理-用余弦定理、正弦定理解三角形(第3课时)
20-21高一下·浙江·期末
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7 . 设A,B两点在河的两岸,为测量A,B两点间的距离,小明同学在A的同侧选定一点C,测出A,C两点间的距离为80米,
,请你帮小明同学计算出A,B两点间的距离,距离为( )米.
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724640925564928/2724923944042496/STEM/8dd99621-68d2-4932-ae23-082770b97b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec142d86673146ac12216ddfd36b17b8.png)
![](https://img.xkw.com/dksih/QBM/2021/5/19/2724640925564928/2724923944042496/STEM/8dd99621-68d2-4932-ae23-082770b97b5c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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2021-05-20更新
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8卷引用:湖南省长沙市第一中学2021-2022学年高一下学期期中数学试题
湖南省长沙市第一中学2021-2022学年高一下学期期中数学试题湖南省衡阳市第一中学2021-2022学年高一上学期期中数学试题浙江省温州十校联合体2020-2021学年高一下学期期中联考数学试题甘肃省庆阳市宁县第一中学2022-2023学年高一下学期期中数学试题(已下线)高一下期中真题精选(易错60题专练)-【满分全攻略】2022-2023学年高一数学下学期核心考点+重难点讲练与测试(人教A版2019必修第二册)(已下线)【新东方】在线数学143高一下河南省安阳市安东新区第一高级中学2021-2022学年高二上学期9月考试数学试题河南省项城市第三高级中学2021-2022学年高二上学期10月第一次段考数学试题(A)