名校
解题方法
1 . 如图:某公园改建一个三角形池塘,
,
(百米),
(百米),现准备养一批观赏鱼供游客观赏.
内部取一点P,建造APC连廊供游客观赏,如图①,使得点P是等腰三角形PBC的顶点,且
,求连廊
的长(单位为百米);
(2)若分别在AB,BC,CA上取点D,E,F,并建行连廊,使得
变成池中池,放养更名贵的鱼类供游客观赏.如图②,当
为正三角形时,求
的面积的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8d2f071d81d49db9e811e33878dd1fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a57ee683509f6f257e5dfa083ccf99e5.png)
(2)若分别在AB,BC,CA上取点D,E,F,并建行连廊,使得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72cb97395ebc5ee1b212afb7a97b985c.png)
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2022-05-27更新
|
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8卷引用:吉林省长春市长春吉大附中实验学校2022-2023学年高三上学期第三次摸底考试数学试题
2 . 位于灯塔A处正西方向相距
n mile的B处有一艘甲船需要海上救援,位于灯塔A处北偏东45°相距
n mile的C处的一艘乙船前往营救,则乙船的目标方向线(由观测点看目标的视线)的方向是南偏西( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2114d78e5230be4cfba3a4245e5a583.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa82a15632a545ce2cc6dc998899807.png)
A.30° | B.60° | C.75° | D.45° |
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2022-05-14更新
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7卷引用:吉林省吉林市2022届高三下学期第三次调研测试理科数学试题
吉林省吉林市2022届高三下学期第三次调研测试理科数学试题吉林省吉林市2022届高三下学期第三次调研测试文科数学试题(已下线)专题15 解三角形及其应用(讲义)-2023年高考数学一轮复习精讲精练宝典(新高考专用)(已下线)第05讲 正弦定理和余弦定理的应用 (精讲)-1(已下线)第四章 三角函数与解三角形 第七节 解三角形应用举例(A素养养成卷)(已下线)考点16 解三角形实际应用问题 --2024届高考数学考点总动员【讲】(已下线)热点3-3 正弦定理与余弦定理(8题型+满分技巧+限时检测)
3 . 如图,
是等边三角形,
是等腰三角形,
交
于
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ac451db3443cabb204f96c31fd4a02e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ced7149776daa2f25792ea3e51bbfec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89e1428974eecbbe213e7708ec2b4673.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32217457c4e96e2ef155cf15c1b65d97.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/af9a78d8-5f1a-4a1a-9add-2d7902df87f3.png?resizew=168)
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6卷引用:吉林省长春市长春吉大附中实验学校2022-2023学年高三上学期第四次摸底考试数学试题
吉林省长春市长春吉大附中实验学校2022-2023学年高三上学期第四次摸底考试数学试题浙江省杭州学军中学2022-2023学年高二上学期开学考试数学试题河南省禹州市北大公学禹州国际学校2022-2023学年高二上学期开学考试数学试题广东省东莞市第四高级中学2023届高三上学期9月月考数学试题江西省临川第一中学2023届高三上学期第一次月考数学(文)试题(已下线)第六章 平面向量及其应用章末题型大总结 (精讲)(3)-【精讲精练】2022-2023学年高一数学下学期同步精讲精练(人教A版2019必修第二册)
4 . 在
中,D为AC边上一点,
,
,
.
(1)求
的值;
(2)若
,求AD的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55c24a968c73e960698a572ab01e3698.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07140f277a35733d8c97577ccdd4e3ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8de006cef9e5efbcbf74229845804650.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/395c8d0c2d490ffd4d6aadfb3517f9ec.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
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2021-04-17更新
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4卷引用:吉林省松原市长岭县第二中学2021届高三下学期三模考试数学试题
名校
解题方法
5 . 如图,现有一个以
为圆心角、湖岸
与
为半径的扇形湖面
.现欲在弧
上取不同于
的点
,用渔网沿着弧
(弧
在扇形
的弧
上)、半径
和线段
(其中
∥
),在该扇形湖面内隔出两个养殖区域—养殖区域I和养殖区域II.若
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/17c1a9d3-44e8-48ea-ba81-454e4c49b3d1.png?resizew=407)
(1)用
表示
的长度;
(2)求所需渔网长度(即图中弧
、半径
和线段
长度之和)的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d7b2fe01a33c4825f9974ed9663a99c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a77343ecde1c2665df291761b6563.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52705567101a48893de582656ef41527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d162c29b1e484cfc87350dd68f00b85.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f7983aade7a7c61f065c5bd3569fbd2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/10/17c1a9d3-44e8-48ea-ba81-454e4c49b3d1.png?resizew=407)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
(2)求所需渔网长度(即图中弧
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次
2016-12-03更新
|
1009次组卷
|
2卷引用:吉林省白山市抚松县抚松县第一中学2023届高三二模数学试题
6 . 已知
为圆
上的四点,过
作圆
的切线交
的延长线于点
,且
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/b0b144a8-c83c-4a34-a137-99eeb2089ef9.png?resizew=191)
(Ⅰ)求弦
的长;
(Ⅱ)求圆
的半径
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c82a10b4f0c9323d726804c89dd9548.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef227e3c17e425d6809b50489f83f50b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74133fcf63bd764a180ffbe91b7e5b97.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/12/b0b144a8-c83c-4a34-a137-99eeb2089ef9.png?resizew=191)
(Ⅰ)求弦
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(Ⅱ)求圆
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
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2016-12-04更新
|
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3卷引用:2017届吉林省梅河口市第五中学高三一模数学(理)试卷