1 . 已知
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6bc35db88f7cce76a28f530afbe23be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cce106d1727fd5390379740bb64fbdc.png)
A.-![]() | B.-![]() | C.![]() | D.![]() |
您最近一年使用:0次
2017-09-09更新
|
982次组卷
|
4卷引用:2015-2016学年辽宁沈阳二中高一下学期期末数学试卷
2015-2016学年辽宁沈阳二中高一下学期期末数学试卷陕西省黄陵中学2017-2018学年高二(重点班)上学期开学考试数学试题内蒙古开来中学2018-2019高一下学期期末考试数学(文)试卷(已下线)专题5-2 同角三角函数变形与求值(1) - 【巅峰课堂】题型归纳与培优练
名校
2 . 已知
是斜三角形,内角
所对的边的长分别为
.已知
.
(I)求角
;
(II)若
=
,且
求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3edd51c782333e04862704165622ad68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bbf5887ebf0a2fb425dc594bb983585.png)
![](https://img.xkw.com/dksih/QBM/2016/11/24/1573177637593088/1573177643655168/STEM/b6c58aa8b3e146afa83f8643cfed3404.png)
(I)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(II)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce0249a3ff99c083fa4421877549db1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e92217ba1661fa14b9503e0ac2ec105b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
您最近一年使用:0次
2016-12-05更新
|
780次组卷
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10卷引用:2016-2017学年辽宁庄河高中高二10月考文数试卷
2016-2017学年辽宁庄河高中高二10月考文数试卷2016-2017学年辽宁庄河高中高二10月考理数试卷辽宁省沈阳市东北育才学校2015-2016学年高三上学期第一次模考数学试题(文科)2016届辽宁省抚顺市一中高三10月月考文科数学试卷2016届江西省上高二中高三第七次月考文科数学试卷2015-2016学年广东省普宁一中高二下第一次月考文科数学试卷2016届山西省太原市高三下第三次模拟文科数学试卷2020届甘肃省河西五市部分普通高中高三第一次联合考试数学文科试卷广西北流市实验中学2019-2020学年高一下学期期中考试数学试题甘肃省武威市民勤县第一中学2022-2023学年高二上学期开学考试数学试题
3 . 如图,一船在海上自西向东航行,在
处测得某岛
的方位角为北偏东
角,前进
千米后在
处测得该岛的方位角为北偏东
角.已知该岛周围
千米范围内(包括边界)有暗礁.现该船继续东行.当
与
满足下列__________ (填序号)条件时,该船没有触礁危险.
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146910629888/1573146916020224/STEM/c5914110ea1648168887dd08f3c656c2.png?resizew=178)
(1)
;
(2)
;
(3)
;(4)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://img.xkw.com/dksih/QBM/2016/11/14/1573146910629888/1573146916020224/STEM/c5914110ea1648168887dd08f3c656c2.png?resizew=178)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26f5f44e740850dc4831f7e98e0937e3.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb2e8b4ed6ddd3eb40626ef84daf5120.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0db5265b89e1263ac033875e089f52b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce835832032b148cd69d2825c633370.png)
您最近一年使用:0次
解题方法
4 . 在
中,内角
,
,
的对边分别为
,
,
,且
,已知
,
,
.求:
(1)
和
的值;
(2)
的值.
![](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/069390dd908ff203327958117a226593.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c158027938822f7a229324647d9e0abc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9aa264e9841cb820cc0fd29f79ee958.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/916d456a55434fcf304260fb94c321ed.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63c631f55f2b59c07c4654f1fd2590ec.png)
您最近一年使用:0次
2016-12-04更新
|
292次组卷
|
2卷引用:2017届辽宁庄河市高级中学高三9月月考数学(理)试卷
5 . 函数
的图象与函数
(
)的图象的交点为
,则![](https://img.xkw.com/dksih/QBM/2016/10/17/1573072451739648/1573072457777152/STEM/4335ce81b8514623a13feebcab43689f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7d222e4fd5b45c71e0eca299f5de76f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/158ca86d0ca2d9a43d54b045f8f8798e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0040b22eaf8f0e679fdbdc9220bed5b.png)
![](https://img.xkw.com/dksih/QBM/2016/10/17/1573072451739648/1573072457777152/STEM/e8d1fb998cfc4ee5a35b91c8831d6efe.png)
![](https://img.xkw.com/dksih/QBM/2016/10/17/1573072451739648/1573072457777152/STEM/4335ce81b8514623a13feebcab43689f.png)
A.2 | B.4 | C.6 | D.8 |
您最近一年使用:0次
名校
解题方法
6 . 在
中,角
的对边分别为
,已知
.
(1)求角
的大小;
(2)若
,求
的面积
的最大值,并判断当
最大时
的形状.
![](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/b6be5df3124229a16a202431a2a1ce7d.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2016-12-04更新
|
562次组卷
|
4卷引用:2016-2017年辽宁盘锦高级中学高二理10月月考数学试卷
7 . 已知函数
.
(Ⅰ)求函数
的最小值;
(Ⅱ)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b557a8c90672cabf2a94a02bb7632f6.png)
(Ⅰ)求函数
![](https://img.xkw.com/dksih/QBM/2016/9/6/1572999848386560/1572999853867008/STEM/5d49b8f61b0144db8f46cc59cc45173e.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aafb03f9dece336cce717a8a8f17d307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b659414d99b384490e3aa8c38820a52a.png)
您最近一年使用:0次
2016-12-04更新
|
410次组卷
|
3卷引用:2015-2016学年辽宁庄河市高级中学高一下期末数学文试卷
8 . 已知函数
.
(1)求
在
上的单调区间;
(2)设
求
的值.
![](https://img.xkw.com/dksih/QBM/2016/10/20/1573084344827904/1573084350767104/STEM/26b48903c0234386b9bfde161a544165.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2016/10/20/1573084344827904/1573084350767104/STEM/a044f7f01b094c828fb10e1142e72c78.png)
![](https://img.xkw.com/dksih/QBM/2016/10/20/1573084344827904/1573084350767104/STEM/e308823f0f2941378be9da2cf52248f1.png)
(2)设
![](https://img.xkw.com/dksih/QBM/2016/10/20/1573084344827904/1573084350767104/STEM/c38dc026eb684469a76eff098ec35918.png)
![](https://img.xkw.com/dksih/QBM/2016/10/20/1573084344827904/1573084350767104/STEM/e5b9e6a0943d442faa1727c7ec83e2f5.png)
您最近一年使用:0次
2016-12-04更新
|
302次组卷
|
2卷引用:2015-2016学年辽宁庄河市高级中学高一下期末数学理试卷
名校
解题方法
9 . 在
中,角A、
、
的对边分别为
、
、
,则以下结论错误的为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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)
A.若![]() ![]() |
B.![]() |
C.若![]() ![]() ![]() ![]() |
D.若![]() ![]() |
您最近一年使用:0次
2016-12-04更新
|
488次组卷
|
4卷引用:2016-2017年辽宁盘锦高级中学高二理10月月考数学试卷
10 . 在
中,角
的对边分别为
,且满足
.
(1)求角
的大小;
(2)求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/839e2d252268350fc291c05d60862055.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eba69af59e628177be7b1480122ef90d.png)
您最近一年使用:0次
2016-12-04更新
|
1470次组卷
|
9卷引用:2015-2016学年辽宁葫芦岛一中等校高二6月联考文数学卷
2015-2016学年辽宁葫芦岛一中等校高二6月联考文数学卷辽宁省实验中学2017届高三下学期第六次模拟考试数学(文)试题辽宁省葫芦岛协作体2017届高三下学期模拟考试(6月)数学(文)试题辽宁省葫芦岛协作体2017届高三下学期模拟考试(6月)数学(理)试题2辽宁省实验中学2017届高三下学期第六次模拟考试数学(理)试卷【全国校级联考】辽宁省葫芦岛协作体2017届高三下学期模拟考试(6月)数学(理)试题辽宁省葫芦岛协作体2017届高三下学期模拟考试(6月)数学(理)试题1山东省济南市济钢高级中学2019-2020学年高三上学期10月月考数学试题上海市建平中学2017-2018学年高三上学期12月月考数学试题