名校
1 . 已知
.
(1)求
的取值范围;
(2)若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4c713535cdad706e60b91f752d99e2f.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94440d3e4c073f94f2b266ff99d50e74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ca5fd57c2c2fcc3c7a574fdd1467d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97e188ac2faddbfc1af5ccc789c7cae3.png)
您最近一年使用:0次
2023-02-19更新
|
468次组卷
|
5卷引用:贵阳省铜仁市2023届高三下学期适应性考试(一)数学(理)试题
2 . 在直角坐标系
中,以
为始边分别作角
,
,其终边分别与单位圆交于点
,
.
(1)证明:
;
(2)已知
,
为锐角,
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4e4c210b2342523b23a43e0a5fd4f63.png)
(2)已知
![](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/7e82e61189eee22b8a316b16ead9fed5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ccd1dfdc167165bcad456709247c723.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800db22e042a298041eda8b0c72abb7c.png)
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2023-04-04更新
|
172次组卷
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2卷引用:贵州省贵阳市三新改革联盟校2022-2023学年高一下学期4月联考数学试题
解题方法
3 . 记
的内角A,B,C的对边分别为a,b,c,且
.
(1)求
;
(2)若O为
的重心,且
,证明:
是等腰三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f806d873932e10c0c16221e6bd60935.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5201fc26d013f6fb889933c0e32f5c53.png)
(2)若O为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8a621bfa70a014bdcdb58697f099b597.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解题方法
4 . 设
的内角A,B,C所对的边为a,b,c,
的面积为S.且有关系式:
.
(1)求C;
(2)求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56702c801bb76109e130e5773d77e557.png)
(1)求C;
(2)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e5b29272ac11f664c287453c5ac6ad9.png)
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5 .
的内角
所对的边分别为
,
,
,已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/397fca77f42d61ad3ff5388cee5bf80e.png)
(1)若
,证明:
;
(2)若
,
,求
的面积.
![](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/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/397fca77f42d61ad3ff5388cee5bf80e.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f9343f74bf345d23c44b16b8f2caa56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f059da60566b92b61d34897d99fe597.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8624f5dff56da4a587ef079483f90222.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a3c442579603164f3fc19458677d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2022-12-21更新
|
194次组卷
|
4卷引用:贵州省毕节市部分学校2023届高三上学期12月联合考试数学(理)试题
6 . 如图,已知平行六面体
的底面
是菱形,
,
且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/0ae83c6c-1abc-4d73-a221-c4cce03141e4.png?resizew=168)
(1)试在平面
内过点
作直线
,使得直线
平面
,说明作图方法,并证明:直线
;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7140fdf18ef6197cc694c6f5cea5e82.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c04a388de58d15d66696048927e9af1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb1e5f3c45a5c53940c2fad4658cb69.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/20/0ae83c6c-1abc-4d73-a221-c4cce03141e4.png?resizew=168)
(1)试在平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23976db53f05b3d5d791c4d736a7184d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73845d4d663b3de0b281611fe2c762fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24540ddbb1a3f71004501da5122eb183.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7935fe3125f247b7bea4f065ce9ad985.png)
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7 . 设△ABC的内角A,B,C的对边分别为a,b,c,
,且B为钝角.
(1)证明:
;
(2)再从下列三个条件中选出两个条件,求△ABC的面积.①
,②
,③
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e008862231c1f2e9b6197ea3c5b629aa.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfd2d90ed8b5f265bb5b0a8c84b4b743.png)
(2)再从下列三个条件中选出两个条件,求△ABC的面积.①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42190fdb24c6e918e06eb4a2ebf8856f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b326dc38d92806c8911b9f9e1a3f323e.png)
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2022-11-07更新
|
172次组卷
|
2卷引用:贵阳市2023届高三年级上学期质量监测数学(理)试题
名校
8 . 如图,在平面直角坐标系
中,设角
,
的终边分别与单位圆交于
,
两点,且原点
为单位圆的圆心.设角
的终边绕点
逆时针旋转
后与单位圆交于点
.
![](https://img.xkw.com/dksih/QBM/2022/5/6/2973577752215552/2981466562699264/STEM/d2216906-f1b0-45df-9a32-e05ae1073eda.png?resizew=240)
(1)求点
的坐标;
(2)记
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://img.xkw.com/dksih/QBM/2022/5/6/2973577752215552/2981466562699264/STEM/d2216906-f1b0-45df-9a32-e05ae1073eda.png?resizew=240)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
(2)记
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7d37407a6b75077ba1acfdaeb8bc6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3aec56b5fc729eb55aaac77c6f4a099b.png)
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12-13高一上·内蒙古包头·期末
名校
9 . 已知
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2501370b911dd3c048311c948061e1a.png)
.
(1)求证:
与
互相垂直;
(2)若
与
的模相等,求
.(其中k为非零实数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/07cb870be7768985b06645baef437524.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2501370b911dd3c048311c948061e1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d36b697014a6a7a0683262df05346018.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71ca43808974777649a58258de1436d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ac99a273b6920085438b66ce74b31ef.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a02cde7d415033ea197e645477fb4a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb3c0732a3fbad61b59971d7c112e18.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/628560d39eeb0339fa00c9c15ab2c095.png)
您最近一年使用:0次
2021-10-20更新
|
454次组卷
|
11卷引用:2015-2016学年贵州省凯里一中高一下开学考试数学试卷
2015-2016学年贵州省凯里一中高一下开学考试数学试卷(已下线)2011-2012学年内蒙古包头三十三中高一上学期期末数学试卷(已下线)2012-2013学年浙江省杭州十四中高一上学期期末考试数学试卷(已下线)2014届江苏省阜宁中学高三年级第一次调研考试文科数学试卷2015-2016学年成都外国语学校高一下学期期中考试数学(理)试卷山东省枣庄市第八中学南校区2016-2017学年高一5月月考数学试题河南省南阳市第一中学校2019年高三上学期10月月考数学试题河南省南阳市第一中学校2019-2020学年高三上学期10月月考数学(理)试题(已下线)8.3 向量的坐标表示(作业)-【上好课】2020-2021学年高一数学下册同步备课系列(沪教版2020必修第二册)苏教版(2019) 必修第二册 过关斩将 第10章 10.1.1 两角和与差的余弦江苏省扬州中学2022-2023学年高一下学期期中数学试题
名校
解题方法
10 . 如图,在△ABC中,D是AC边上一点,∠ABC为钝角,∠DBC=90°.
![](https://img.xkw.com/dksih/QBM/2022/8/28/3054430287618048/3054944911024128/STEM/f589aa2d68534a9787bec02559bcceac.png?resizew=191)
(1)证明:
;
(2)若
,
,再从下面①②中选取一个作为条件,求△ABD的面积.
①
;②
.
![](https://img.xkw.com/dksih/QBM/2022/8/28/3054430287618048/3054944911024128/STEM/f589aa2d68534a9787bec02559bcceac.png?resizew=191)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dea7721cb3cc3bc9a837805df2be00e6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b8b709a173120436dac669c74b927d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acb3f56ccf86476f99c1cb18fc7cca21.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e98a8ee55f8d77e8a669cea6c0c7547c.png)
您最近一年使用:0次
2022-08-29更新
|
1818次组卷
|
10卷引用:贵州省普通高等学校招生2022届高三适应性测试数学(理)试题
贵州省普通高等学校招生2022届高三适应性测试数学(理)试题贵州省普通高等学校招生2022届高三适应性测试数学(文)试题(已下线)回归教材重难点02 三角函数与解三角形-【查漏补缺】2022年高考数学(理)三轮冲刺过关(已下线)3.5 正余弦定理(精讲)-【一隅三反】2023年高考数学一轮复习(基础版)(新高考地区专用)湖南省长沙市麓山国际实验学校2022-2023学年高三上学期入学考试数学试题福建省厦门外国语学校2023届高三上学期第一次月考数学试题(已下线)专题14 解三角形图形类问题-1(已下线)专题20 解三角形-1(已下线)微专题09 解三角形图形类问题(1)-【微专题】2022-2023学年高一数学常考点微专题提分精练(人教A版2019必修第二册)(已下线)专题3-4解三角形大题综合归类-2