13-14高三上·湖北武汉·阶段练习
名校
解题方法
1 . 在△ABC中,角A,B,C的对边分别为a,b,c.已知2cos(B-C)+1=4cosBcosC.
(Ⅰ)求A;
(Ⅱ)若a=2
,△ABC的面积为2
,求b+c.
(Ⅰ)求A;
(Ⅱ)若a=2
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/619096595112f0340a43b756e114dd3d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
您最近一年使用:0次
2016-12-02更新
|
1041次组卷
|
3卷引用:2014届湖北省武汉市高三9月调研测试理科数学试卷
2013·湖北武汉·一模
名校
2 . 如图,已知单位圆上有四点
,
,
,
,其中
,分别设
的面积为
和
.
(1)用
表示
和
;
(2)求
的最大值及取最大值时
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813597f052c8930e12f0a22aeaa3cce1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f80f8b5132f5657620c47c9ac7d5e31e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4960f79aae1f6716685ea6e8ff73b33d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63843baec8a52ef4e70d7872d493d07a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bfa314f141de4c1f73432c8cad4a841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42de297d4bb58a48223827b1c520f74c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f42f39cdc758f215a5401119f292c2ed.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d8dc19a5c4ff0d14de4bf62716467f8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
您最近一年使用:0次
2016-12-02更新
|
1472次组卷
|
6卷引用:2013届湖北省武汉二中高三高考模拟理科数学试卷
(已下线)2013届湖北省武汉二中高三高考模拟理科数学试卷【全国百强校】湖北省宜昌市第一中学2017-2018学年高二下学期期末考试数学(理)试题上海市北虹、上理工附中、同二、光明、六十、卢高、东昌等七校2016-2017学年高三上学期12月月考数学试题上海市七校2017届高三上学期12月联考数学试题广东省深圳市盐田高级中学2023届高三上学期10月月考数学试题(已下线)专题12 盘点解三角形中最值问题的四种方法-1
2012·湖北·一模
3 . 已知函数
, 其中![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/f239edacb3314e5d8b084c9a532064c3.png)
,其中
若
相邻两对称轴间的距离不小于![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/a912d3500309438eb455df8b84e49fdf.png)
(1)求
的取值范围;
(2)在
中,
、
、
分别是角A、B、C的对边,
,当
最大时,
求
的面积.
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/95dcac4e08ae4e39bfd6116d89d9e622.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/f239edacb3314e5d8b084c9a532064c3.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/469aa458f6494946979f6cb90f2770e8.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/23227d082c2a448a9e374ad27c38663e.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/208743e38f1943a0992404888bd52412.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/a912d3500309438eb455df8b84e49fdf.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/ddc6c2e745264ac097c56997db2145a0.png)
(2)在
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/bdb26878ac6b4d7ea4f0ee74fc175c0e.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/ecb8d8cae9404e8991d7d3958443ead1.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/60751cd037714cdf9781da53357543b1.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/7eceb6bde0dc40a9a7bbcfacc926b85f.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/7e2b2ec9091349f3ba1fdda24e297e9c.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/ddc6c2e745264ac097c56997db2145a0.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/626b5c2b0bc9436ca60697c3823f2583.png)
![](https://img.xkw.com/dksih/QBM/2012/1/14/1570692036714496/1570692041818112/STEM/bdb26878ac6b4d7ea4f0ee74fc175c0e.png)
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10-11高三下·重庆·阶段练习
解题方法
4 . 在
中,边
分别为角
的对边,若
且
.
(1)求角
的度数;
(2)若
,求
的面积
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88f2599ca8b6b683e57a82699c8b1ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce7af7c5df749c6fa9bbe87faa72c66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9e2953b6644f93b618d2f8f2751e210.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/242b0af4f33851007b2052508dd3790e.png)
(1)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dbf993b0d0f6aa5c68e47f4fc2a4489.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
您最近一年使用:0次