在锐角
中,角
、
、
的对边分别为
、
、
,且
.
(1)求角
的大小;
(2)当
时,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a239b83bf3331ae7e078b2088bdb5b18.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51338dfe102f800a0f0e9d502bdfb4d1.png)
21-22高三上·湖北·开学考试 查看更多[7]
湖北省新高考联考协作体2021-2022学年高三上学期新起点考试数学试题黑龙江省哈尔滨师范大学附属中学2021-2022学年高三上学期第一次月考数学(文)试题(已下线)专题03 解三角形(周长问题)-【解题思路培养】2022年高考数学一轮复习解答题拿分秘籍(全国通用版)甘肃省名校2021-2022学年高三上学期第一次月考 数学(文)试题(已下线)专题08 解三角形(选择题、填空题、解答题)-备战2022年高考数学(文)母题题源解密(全国甲卷)(已下线)第33讲 章末检测五-备战2023年高考数学一轮复习考点帮(新高考专用)重庆市酉阳县第三中学校2021-2022学年高一下学期第二次月考数学试题
更新时间:2021-09-11 22:19:29
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解答题-问答题
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适中
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解题方法
【推荐1】在①
且
,②
,③
这三个条件中任选一个,补充在下面问题中,并解答该问题.
问题:锐角
的内角
的对边分别为
,
且_________.
(1)求A;
(2)求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e62315a213f2c15d3a345c7ac5396c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb8391a30a191b22e483db135fd476cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6ede0a9a3bd8f24316247a5a0cd60adb.png)
问题:锐角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b4c08559eb294e94c1ecc9cb1cf4720.png)
(1)求A;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93a5801e8be81aae66c47cc058fe370c.png)
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【推荐2】已知a,b,c分别是
的内角A,B,C所对的边,且满足
.
(1)求
;
(2)若
的面积为
,且
,求c的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6431331fac107f05736a7d44db782692.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6402f1010e94be78552ed4c45548b1b8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30b12efb03327f461e868b2ea433f9b0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/289295fad0d1c11fc74470e8bb0c6be0.png)
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【推荐1】已知
内角
、
、
的对边为
、
、
(其中
),若
.
(1)求角
的大小;
(2)若点
是边
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,
,求
的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad5e009486af263893ca8290be72f258.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abc74a7db98d9ac489cf01a28a3503a0.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c185466a3517b2f1453e175748963873.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
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【推荐2】已知函数f(x)=(sinx+cosx)2+2
sin2x.
(Ⅰ)求函数f(x)的最小正周期;
(Ⅱ)在△ABC中,角A,B,C的对边分别是a,b,c,且满足2acosC+c=2b,求f(B)的取值范围.
![](https://img.xkw.com/dksih/QBM/2015/8/7/1572202914947072/1572202920894464/STEM/bfc2ea7e1518477f9b646c1eccbe4837.png)
(Ⅰ)求函数f(x)的最小正周期;
(Ⅱ)在△ABC中,角A,B,C的对边分别是a,b,c,且满足2acosC+c=2b,求f(B)的取值范围.
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【推荐1】如图,已知某社区内有一个圆形绿化区,经规划调研确定,将
区域修建成居民休闲区.为方便居民通行,在圆上选取一点A,修建两条小路AB,AD(不考虑小路的宽度).已知
,
.
![](https://img.xkw.com/dksih/QBM/2022/2/19/2874384640622592/2929594155081728/STEM/88172092a53040769ea02b663d408080.png?resizew=134)
(1)若
,
,求居民休闲区的面积;
(2)若
,求修建的小路长度之和(即
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eca7e1a727ba332984ad857b3d25344d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://img.xkw.com/dksih/QBM/2022/2/19/2874384640622592/2929594155081728/STEM/88172092a53040769ea02b663d408080.png?resizew=134)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d649afbddd907f0dfec1420f02f82fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/267ace52b64e1e7dfc5211e033255b7d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/032ee24d2f1bd17afda6676eabcf82c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c760db19b0826e4542f132adeabae414.png)
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【推荐2】已知在
中,角
的对边分别为
,
为
的面积,且
.
(1)求角
的大小;
(2)若
与
的内角平分线交于点
,
的外接圆半径为2,求
周长的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e30c0a5c92f50dce1f7624709950ff5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0ec18aa8ab6f4a4e70722e4df77c9c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f871e2c49ece9a49b64ef874adee415d.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e105760638b22b26ff8bec4354255e4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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