名校
解题方法
1 . 设
的内角A、B、C的对边分别为a、b、c.已知
,
.
(1)求C的值;
(2)若
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea99e6b51b8c3c3f24b1e908545ec653.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c765c5a991982ac4b939ebc98237ff2.png)
(1)求C的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb3f0ef69ff6b52e5f028965ba7b0cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-03-26更新
|
561次组卷
|
3卷引用:陕西省西安地区八校2023届高三下学期第二次联考文科数学试题
解题方法
2 . 在
中,内角
,
,
所对的边分别为
,
,
,已知
,
.
(1)求
的值;
(2)若
,求
的面积.
![](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/9daf08f293c17460bc37ba2d1e64be91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee0a3e3daf59f71917ad0902c664fc6c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03005d17bf564371ad29fea41f5c650.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36e15cbd7c42d7b15d7ba8d2b28ab8df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-03-25更新
|
501次组卷
|
4卷引用:陕西省部分名校2023届高三下学期高考仿真模拟文科数学试题
陕西省部分名校2023届高三下学期高考仿真模拟文科数学试题陕西省部分名校2023届高三下学期高考仿真模拟理科数学试题海南省2023届高三一轮复习调研考试数学试题(已下线)重难点专题01 正弦定理与余弦定理-2022-2023学年高一数学重难点题型分类必刷题(人教B版2019必修第四册)
名校
3 . 在
中,
为
的角平分线上一点,且与
分别位于边
的两侧,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce474c21870049e64788fa5b3303f8de.png)
的面积;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/43e4bd02d4bd6b72e77b7d5e52b183e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f10681704c4fccfd37664eaf34391dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce474c21870049e64788fa5b3303f8de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/684c3c84da636f306191b50caf33f0f5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d6c13ae80772a230d14873d84d0b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b3182db896bc2462331796e2a6108363.png)
您最近一年使用:0次
2023-03-23更新
|
1868次组卷
|
9卷引用:陕西省榆林市绥德中学2023届高三下学期2月月考理科数学试题
名校
解题方法
4 . △ABC的内角A,B,C的对边分别为a,b,c,已知
,
.
(1)求
;
(2)若
,求△ABC的周长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fc25b6968fe6730d8b1988a602c77d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/889203df84cdf78a97339ac16b9a600c.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424258051d6d5e8733130cc09379c865.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
您最近一年使用:0次
2023-03-19更新
|
839次组卷
|
4卷引用:陕西省咸阳市2023届高三下学期二模文科数学试题
5 . 一艘海轮从
出发,沿北偏东
的方向航行
后到达海岛
,然后从
出发,沿北偏东10°的方向航行
到达海岛
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/19/fd5d296f-b5e1-480e-b43d-d69de9da117e.png?resizew=152)
(1)求
的长;
(2)如果下次航行直接从
出发到达
,应沿什么方向航行多少
?
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b112f474fc4e1da5e8c0b326c595ce78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/714433bd39aec1f67b2602be1720abf8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4bb32f8af65f456a6748581f20239e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/19/fd5d296f-b5e1-480e-b43d-d69de9da117e.png?resizew=152)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)如果下次航行直接从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c79c4c40ca54ace5faa8ed6298f98614.png)
您最近一年使用:0次
2023-03-19更新
|
362次组卷
|
2卷引用:陕西省西安市第七十中学2022-2023学年高一下学期3月月考数学试题
名校
解题方法
6 . 在
中,内角A,B,C的对边分别为a,b,c,已知
.
(1)求A;
(2)若
为锐角三角形,且
,求
的取值范围.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5391c0c495768e0ee96665f43e9419.png)
(1)求A;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb857a9f1b3f9bacce9a4193ffadfb6e.png)
您最近一年使用:0次
名校
解题方法
7 . 农田节水灌溉的目的是节约水资源、土地资源,节省时间和劳动力,提高灌溉质量和灌溉效率,提高农作物产量和质量,实现增产增效.如图,等腰梯形ABCD是一片农田,为了实现节水灌溉,BC为农田与河流分界的部分河坝,BC长为800米,∠B=75°.现在边界BC上选择一点Q,修建两条小水渠QE,QF,其中E,F分别在边界AB,DC上,且小水渠QE,QF与边界BC的夹角都是60°.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/30b620e2-8ae1-4561-90ee-d65c777e14a5.png?resizew=135)
(1)探究小水渠QE,QF的长度之和是否为定值?若是,求出该定值;若不是,请说明理由.
(2)为实现高效灌溉,现准备在区域AEQFD内再修建一条小水渠EF,试问当点Q在何处时,三条小水渠(QE,QF,EF)的长度之和最小,最小值为多少?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/15/30b620e2-8ae1-4561-90ee-d65c777e14a5.png?resizew=135)
(1)探究小水渠QE,QF的长度之和是否为定值?若是,求出该定值;若不是,请说明理由.
(2)为实现高效灌溉,现准备在区域AEQFD内再修建一条小水渠EF,试问当点Q在何处时,三条小水渠(QE,QF,EF)的长度之和最小,最小值为多少?
您最近一年使用:0次
2023-03-14更新
|
570次组卷
|
4卷引用:陕西省西安市2022-2023学年高一下学期3月阶段检测数学试题
8 . 在△ABC中,已知
,
,
.
(1)求a和c的值;
(2)求b的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fba18f509a4c732c4cffacfd29e4a16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9cb21ae875f36d52d0b6f82b0201d0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d2c413253fe5bc1f9287a35e6fc45eb.png)
(1)求a和c的值;
(2)求b的值.
您最近一年使用:0次
2023-03-09更新
|
352次组卷
|
3卷引用:陕西省宝鸡市金台区2022-2023学年高一下学期期末数学试题
陕西省宝鸡市金台区2022-2023学年高一下学期期末数学试题(已下线)期末考测试(提升)一隅三反系列(人教A版2019必修第二册)安徽省芜湖市普通高中2018-2019学年高一下学期期中联考数学试题
名校
解题方法
9 . 已知
的内角A,B,C所对的边分别为a,b,c,
,
,
,且B为钝角.
(1)求B;
(2)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f08ce80e91fdf435a8e3ec05be990e9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/febfafa9a862668e1582b895120ca3ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15ee608882881caff2f1e223177424ac.png)
(1)求B;
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
2023-02-19更新
|
928次组卷
|
4卷引用:陕西省西安市东方中学2023届高三一模理科数学试题
陕西省西安市东方中学2023届高三一模理科数学试题广东省佛山市荣山中学2022-2023学年高一下学期期中数学试题(已下线)复习专题04正、余弦定理(1)-期末专项复习广西玉林市部分校2023届高三上学期12月月考数学(理)试题
解题方法
10 . 已知
的三个内角A、B、C的对边分别是a、b、c,且满足
.
(1)求角C的值;
(2)若
,
,且
,求
的长度.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5215fbda4d543c26c04b8c318fc00a7b.png)
(1)求角C的值;
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e258ab9e600435b37465092243d99f6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/23725094c363fd158166a8698971694c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dfd76585cf7eece74fdd50acefd1ada.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
您最近一年使用:0次