1 . (1)若
,
求
;
(2)若
,
为单位向量,
,
的夹角为
,求
和函数
,
的最小值;
(3)请在以下三个结论中任选一个用向量方法 证明.
①直径所对的圆周角是直角;②平行四边形的对角线的平方和等于其四边长的平方和;③三角形的三条中线交于一点.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e2be6092676f75f47af10c65181cd3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47713d6ae331e612bebb78651d6fcd4e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fcbdc3d3f846718f1edcbc914c10759.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d5bca00fa20e6e80480b9d06d2e52ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/58054eff6c328eb401995a81c6e91a54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a55f2c39a9cc97ebca1d9f6427290c90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24a57996290794e082b21d8f1dfc322a.png)
(3)请在以下三个结论中任选一个用
①直径所对的圆周角是直角;②平行四边形的对角线的平方和等于其四边长的平方和;③三角形的三条中线交于一点.
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2 . 设平面内两个非零向量
的夹角为
,定义一种运算“
”:
.试求解下列问题,
(1)已知向量
满足
,求
的值;
(2)在平面直角坐标系中,已知点
,求
的值;
(3)已知向量
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5d0692c60541a453ce8cc40c9ce9aa9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e16415b61722f9961e412386e6819f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae66c198f254642011ce81b3eac10c69.png)
(1)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b5f1c99af9a35c4e6f8e7b2c937f99b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09dd1004f81418675f8cfac07219d59c.png)
(2)在平面直角坐标系中,已知点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a2f251adb39c267f761de7faa2194fa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca6d91dae021d8dd78acf8fc094f3f75.png)
(3)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54f73fc24618a444515f0da58716a1fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09dd1004f81418675f8cfac07219d59c.png)
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2024-04-10更新
|
590次组卷
|
2卷引用:浙江省丽水市五校高中发展共同体2023-2024学年高一下学期4月联考数学试题
名校
解题方法
3 . 设
是单位圆上不同的两个定点,点
为圆心,点
是单位圆上的动点,点
满足
(
为锐角)线段
交
于点
(不包括
),点
在射线
上运动且在圆外,过
作圆的两条切线
.
(1)求
的范围
(2)求
的最小值,
(3)若
,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7818812e33052be4de712cbbbb21e2e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.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/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ec8858389f4c3156a946ba8bf0d8a7b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b8d5cf36f04941f4ad49fe4c5e26133.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8eb37a4dd75318dcbd836395e575bd.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e438bc5acc5cc10b3e7138279949a2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63a42e22f8bc63465f595caf10e5842.png)
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2024-04-01更新
|
832次组卷
|
4卷引用:浙江省精诚联盟2023-2024学年高一下学期3月联考数学试题
4 . 设函数
,若将函数
的图象向右平移
个单位长度后得到曲线
,则曲线
关于
轴对称.
(1)求
的值;
(2)若直线
与曲线
在区间
上从左往右仅相交于
三点,且
,求实数
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/585a3c8c2c9ea53b96f76cd1cb9d6416.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cdaf49f9611922348aa2784465da614.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
(2)若直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff4d12362d4b8dd25813953e1c5a94b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/942c2141d01bde6b48210c56a17fc75e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f55cfcbb5c5950e18a8452b38bb17036.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e28cc90f3ab5b1f9cc083cc21b0ff3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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5 . 2023年12月1日,“民族魂·中国梦——阳光下成长”2023年浙江省中小学生艺术节闭幕式暨颁奖晚会在湖州大剧院举行.为迎接艺术节闭幕式的到来,承办方计划将场地内一处扇形荒地进行改造.已知该扇形荒地
的半径为20米,圆心角
,承办方初步计划将其中的
(如下左图,点
位于弧
上,
,
分别位于半径
,
)区域改造为花卉区,扇形荒地
内其余区域改造为草坪区.
,
设计为观光步道,其宽度忽略不计.若观光步道造价为
元/米,请你设计观光步道的造价预算,确保观光步道最长时仍有资金保障;
(2)因某种原因,承办方修改了最初的改造计划,将花卉区设计为矩形
(如下右图,其中
,
位于半径
上,
位于半径
上).为美观起见,承办方最后决定将四边形
设计为正方形.求此时花卉区
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbc790cfaa59a808c25a7edb95dc29fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efba1257f270da9c9f771560695ec1ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.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/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/438f34bc8b04e8c494b91306ac6fe352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5845ffc7d1af9053b027cf9e726f5367.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b1b8bd4a2d822a44598ca977ca7355a.png)
(2)因某种原因,承办方修改了最初的改造计划,将花卉区设计为矩形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5561f04eac30e162a1d9774526675af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5561f04eac30e162a1d9774526675af8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5561f04eac30e162a1d9774526675af8.png)
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6 . 下表是
地一天从
时的 部分时刻与温度变化的关系的预报,现选用一个函数
来近似描述温度与时刻的关系.
(1)写出函数
的解析式:
(2)若另一个
地区这一天的气温变化曲线也近似满足函数
且气温变化也是从
到
,只不过最高气温都比
地区早2个小时,求同一时刻,
地与
地的温差的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ae6eb88163701db545ffa5af97bbf66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
时刻/h | 2 | 6 | 10 | 14 | 18 |
温度/℃ | 20 | 10 | 20 | 30 | 20 |
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)若另一个
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93c534228d6a812977052bc1afa5a95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4ba0f74617296002da26fedb7a461e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
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2024-01-25更新
|
263次组卷
|
3卷引用:浙江省温州市2023-2024学年高一上学期期末教学质量统一检测数学试题(A卷)
浙江省温州市2023-2024学年高一上学期期末教学质量统一检测数学试题(A卷)四川省泸州市泸县第五中学2023-2024学年高一下学期开学考试数学试题(已下线)1.8 三角函数的简单应用-同步精品课堂(北师大版2019必修第二册)
名校
解题方法
7 . 如图所示,镇海中学甬江校区学生生活区(如矩形
所示),其中
为生活区入口.已知有三条路
,
,
,路
上有一个观赏塘
,其中
,路
上有一个风雨走廊的入口
,其中
.现要修建两条路
,
,修建
,
费用成本分别为
,
.设
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/26/1fcb3149-cddf-462f-a228-8f68d1a3c831.png?resizew=179)
(1)当
,
时,求张角
的正切值;
(2)当
时,求当
取多少时,修建
,
的总费用最少,并求出此的总费用.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b68df477b3ee45ac0f725db00d465a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dabfa1b05d1440a42469adf0d871b95c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c88d9142df6ba8e43c1a93bd04a1362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c6526f2b85a9ecb86068dd7690105fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be99fa94a1f3e4964fcc13a14fab9ba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef10ca4f07bbda64d78ee6f13158e279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be99fa94a1f3e4964fcc13a14fab9ba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef10ca4f07bbda64d78ee6f13158e279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb81a200cf22efca514ddc0c5b41e16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ee4166c963f7bf0c7a62f3e2a85d305.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ce5753e08314463418b9ff05a3d2523.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/26/1fcb3149-cddf-462f-a228-8f68d1a3c831.png?resizew=179)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c42b962b2435a1c451d74e128982188.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5514bd4247767f0933213b3aa3a0c3bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3f2232e660554ea1a736b90031a52ce.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a68c918b092abeee116535242a05fa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be99fa94a1f3e4964fcc13a14fab9ba5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef10ca4f07bbda64d78ee6f13158e279.png)
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