1 . 在△ABC中,角A、B、C所对边的长分别为a、b、c,下列结论正确的是( )
A.若![]() ![]() ![]() |
B.若![]() ![]() ![]() |
C.若△ABC是锐角三角形,![]() ![]() ![]() |
D.若![]() ![]() |
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2 . 如图,某渔船在海上
处捕鱼时,天气预报几小时后会有恶劣天气,该渔船的东偏北
方向上有一个小岛
可躲避恶劣天气,在小岛
的正北方向有一航标灯
距离小岛25海里,渔船向小岛行驶50海里后到达
处,测得
,
海里.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/9eadffcb-089f-4ac1-8ce5-d95a08c88a6d.png?resizew=161)
(1)求
处距离航标灯
的距离
;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9d74d47d93f5540e801834aa71b3bc4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dac3e4d0628673acaef12954a56a01ca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/2/9eadffcb-089f-4ac1-8ce5-d95a08c88a6d.png?resizew=161)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
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2021-09-12更新
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807次组卷
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8卷引用:上海市南汇中学2022-2023学年高一下学期期中数学试题
上海市南汇中学2022-2023学年高一下学期期中数学试题安徽省合肥艺术中学2020-2021学年高一下学期第一次调研考试数学试题(已下线)第13课时 课中 余弦定理、正弦定理应用举例山东省枣庄市滕州市第一中学2021-2022学年高一下学期3月月考数学试题山东省枣庄市市中区第三中学2021-2022学年高一下学期3月月考数学试题黑龙江省哈尔滨市第十一中学校2022-2023学年高一下学期4月月考数学试题黑龙江省齐齐哈尔市恒昌中学校2022-2023学年高一下学期期中数学试题(已下线)第6章 三角-同步精品课堂(沪教版2020必修第二册)
名校
解题方法
3 . 下列四个命题:①若
,则
是第二象限角或第三象限角;②
且
是
为第三象限角的充要条件;③若
,则角
和角
的终边相同;④若
,则
.其中真命题的序号是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dddea0134685ce58a7a850ac8aa52aeb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0926a517312b8c73f8428ee683e60a95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bdfc1eef2fde598b0a1ecb4282698e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5426b6d35bef718963baa87e24131c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33c61cfbfd3bf888856b7dc9b2a84c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/116a4f1c8b51d1993e6d7c054e2ed5d7.png)
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名校
解题方法
4 . 在平面直角坐标系中,已知点
的坐标为
,将点
绕原点按逆时针方向旋转角
得到点
,再将点
绕原点按逆时针方向旋转角
得到
,…,如此继续下去,得到前10个点
,
,
,…,
.若
是公差为
的等差数列,且点
,
,
,…,
在同一函数图像上,则角
的取值可以是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88450e5743b62b977d9b63fb23ec8398.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0914b68f106a912420705b2f3928ca42.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3595dd32032103db48892c8ceba4e57a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9721059d158853671eaf19e39769b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9721059d158853671eaf19e39769b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f63729767fc930ac410e7e7f5fad1cd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8db4b168ddbcba90ac9b31d36a0432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9721059d158853671eaf19e39769b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8db4b168ddbcba90ac9b31d36a0432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0709502551b86b7ae008cb6d7c2ec8c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8e28b0935a8bceda0afc67aa39141d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c017ad4035bb0322261d3ec9c3abfcb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e73529eb0880cb7bd3505a183a3d95f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9721059d158853671eaf19e39769b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd8db4b168ddbcba90ac9b31d36a0432.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0709502551b86b7ae008cb6d7c2ec8c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8e28b0935a8bceda0afc67aa39141d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3595dd32032103db48892c8ceba4e57a.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-10-17更新
|
510次组卷
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4卷引用:上海市建平中学2023届高三下学期开学考试数学试题
上海市建平中学2023届高三下学期开学考试数学试题山东省潍坊市2022-2023学年高三上学期10月优生抽测数学试题河北省衡水中学2022-2023学年高三三调考试数学试题(已下线)专题06 函数与导数常见经典压轴小题归类(练习)-2
名校
5 . “得地率”是指可供人活动的区域的占地面积与总占地面积之比.“得地率”越高,也就意味着人们可活动的区域更大,因此在设计活动场地时,通常会将“得地率”作为一个重要的指标进行考虑.上海某大型购物商场欲将地下一层的一块半圆形空地改建为亲子乐园,建造一个供亲子游玩的海洋球池和两个供人们休息和娱乐,且大小完全相同的休息区.除海洋球池和休息区外的剩余空地全部用气垫筑起“高墙”,以保护亲子乐园中的人们.如图所示,设半圆形空地的圆心为
,半径为
,
为直径,矩形海洋球池
的顶点
在
上,顶点
在半圆的圆周上.矩形休息区
和
的顶点
在
上,顶点
在半圆的圆周上,顶点
分别在线段
上.已知
,设
,其中
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/af12af0c-395f-40b9-be6f-8965c23e30df.png?resizew=438)
(1)求当
时该亲子乐园可供人活动的区域面积
,并求出此时的“得地率”(结果精确到
);
(2)求当
为多大时,该亲子乐园的“得地率”最大?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aa0df7f1e45f9de29e802c7f19a4f64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01c74a907dda6bb7d9d56d009d9df253.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39acab3cfb59bfc9591371721ab01d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbc7ee0ef8945ba1b90e59aed7cab889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc8cedba8cf78fb20381c72e9b5f6b06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a1da2078b8e4cb44d7147917152d601e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba7826f255c338257bb731c64c6f12ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c25cddba1adc4e38324a56dc50376a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c46c696ff5f123a482bae81cf9a1b570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d777a41834c51955d719bd68e7bd45d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11db4b9921a9fe4d5c03b17bafc852fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa5a531329748ceebf20280835a4e60f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/10/af12af0c-395f-40b9-be6f-8965c23e30df.png?resizew=438)
(1)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/905dd10639c9fef5ef8d66a124756140.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edb1e0c3e2fb29b0b35d51d22a5710d.png)
(2)求当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
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22-23高三上·上海浦东新·开学考试
名校
6 . 对开区间
,定义
,当实数集合
为
段(
为正整数)互不相交的开区间
的并集时,定义
,若对任意上述形式的
的子集
,总存在
,使得
,其中
,则
的最大值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/095747cd995cc4524071c66ab76e5fe4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9fa78977d3830bb863c4df4ba362064.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b53f84ec1c2416ead2a3f92d05af188a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36ca25c7ef458ef1da40d7f1d2d99c1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82a7792efd7f82bfa7549db4cb6ca761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/232d1ce3ad14256b1543e6007ff1675d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8a593f20de490729bc067552e62661e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c8145182f289fbed90bbce4fe773205.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
名校
解题方法
7 . 已知正三角形
面积为
,D为边
上一点,且
.射线
沿与
夹角为α的方向射到边
上的点E,经
反射交边
于点F.射线
经边
反射交
于点G.若点G在线段
上(不包括端点C、D),则α的取值范围为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7cb903441d8e6b4448c3d5d7959d9d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa44b161ccef3dd736cdb2d78e78ddcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.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/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.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/9d78abbad68bbbf12af10cd40ef4c353.png)
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2021·上海浦东新·三模
名校
8 . 某工厂承接制作各种弯管的业务,其中一类弯管由两节圆管组成,且两节圆管是形状、大小均相同的斜截圆柱,其尺寸如图1所示(单位:
),其中斜截面与底面所成的角为
,将其中一个斜截圆柱的侧面沿
剪开并摊平,可以证明由截口展开而成的曲线
是函数
的图像,其中
,
,如图2所示.
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725319832076288/2730995936878592/STEM/306e80d3-1869-484b-b0c3-2bec5b669829.png?resizew=228)
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725319832076288/2730995936878592/STEM/6a824180-fff5-4dc0-822f-7fb64b201efd.png?resizew=240)
(1)若
,求
的解析式;
(2)已知函数
的图像与x轴围成区域的面积可由公式
计算,若制作该种该类弯管的一截圆管所用材料面积(即斜截圆柱的侧面积)等于与之底面相同且高为
的圆柱的面积,求
的值(结果精确到
).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e58750ec6571eaa9f2ac3ca6f0a6ce5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4a63412a8e10dca8d002978e17c45a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2480f87a11c4cd450bc9454ea7276722.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725319832076288/2730995936878592/STEM/306e80d3-1869-484b-b0c3-2bec5b669829.png?resizew=228)
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725319832076288/2730995936878592/STEM/6a824180-fff5-4dc0-822f-7fb64b201efd.png?resizew=240)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e2e859e649b43a21b623f63472122a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
(2)已知函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c530f4b7491b95acb8ce3eef9aa09d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e58a22ac4aca667f4363d3526feb8f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18703d241f6fe0a0dedcc815603322fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1008a3fc217ce647e16fa09e42ceadb1.png)
您最近一年使用:0次
9 . 设正六棱锥
的底面积为
,高为h,侧面积为S,
(1)将S表示为h的函数;
(2)当
时,求
的正弦值;
(3)将F到平面
的距离d表示为h的函数,并求d的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3b7838a53d0b3ed4565fb6a890f365d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
(1)将S表示为h的函数;
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c1447d5ea9ed1b6ccb5a3e5aa967595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb686e4f5e3938575bc547e849d5513f.png)
(3)将F到平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c54d01623f09f23103f03ba1135fc6a.png)
您最近一年使用:0次
10 . 某观测站
在港口
的南偏西
的方向上,在港口
的南偏东
方向的
处有一艘渔船正向港口
驶去,行驶了20千米后,到达
处,在观察站
处测得
间的距离为31千米,
间的距离为21千米,问这艘渔船到达港口
还需行驶多少千米?
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2022-12-13更新
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6卷引用:上海市陆行中学2021-2022学年高一下学期期末数学试题
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