1 . 设
为第四象限的角,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab625b4ff7ca6a4946bdc9af1e6dde8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26ab55147ca5c0f958af43b0637ee31b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edb10eaa4042ef8d2419a5c23af54509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab625b4ff7ca6a4946bdc9af1e6dde8b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2016-12-04更新
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567次组卷
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4卷引用:2016届河南省郑州市高三第二次模拟考试文科数学试卷
2 . 在
中,角
所对的边分别为
,且满足
.
(1)求角
的值;
(2)若
且
,求
的取值范围.
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572791387758592/1572791393083392/STEM/e0ee8e68291845319184549ed8659b43.png)
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572791387758592/1572791393083392/STEM/9686233a05a54720b9e5d6d62a0fb455.png)
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572791387758592/1572791393083392/STEM/1d2e712d36bd49718648daf884e0e1c1.png)
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572791387758592/1572791393083392/STEM/5b10dae4e28645bd80e6b23c4dd4433d.png)
(1)求角
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572791387758592/1572791393083392/STEM/89dd9f9787d14291a72676f598e05455.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572791387758592/1572791393083392/STEM/4cd852a23f444e0cb5c2188b8138dbd3.png)
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572791387758592/1572791393083392/STEM/346c5be4ae874987947685e4dbb6344f.png)
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572791387758592/1572791393083392/STEM/4aea5e0c83f04ddf93b53c524e3f5fc8.png)
![](https://img.xkw.com/dksih/QBM/2016/6/22/1572791387758592/1572791393083392/STEM/5dddf6ba54944eb7bcd9d353be72fa7e.png)
您最近一年使用:0次
2014·河南郑州·一模
3 . 在
ABC中,记角A,B,C的对边为a,b,c,角A为锐角,设向量
,
,且
.
(1)求角A的大小及向量
与
的夹角;
(2)若
,求
ABC面积的最大值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6595597d25112f247753397d25bf5080.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bcd3033ce0ce4ce9f7e7fb6c676ff5bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/975ea2ec791af49d4b230968fd3156ff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f6e8c6151a9e315cf4abd2045ee3621.png)
(1)求角A的大小及向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7a1df960feef63dec4790d63f52279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1225fd03e8e8730dac8487dae5387635.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6595597d25112f247753397d25bf5080.png)
您最近一年使用:0次
2016-12-03更新
|
2331次组卷
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3卷引用:2015届河南省中原名校高三上学期第一次摸底考试数学理科数学试卷
(已下线)2015届河南省中原名校高三上学期第一次摸底考试数学理科数学试卷2017届湖北襄阳四中高三七月周考二数学(文)试卷江苏省淮安市楚中、新马、清浦、洪泽高中四校联考2019-2020学年高三上学期期中数学试题