1 . 在△ABC中,角A,B,C的对边分别为a,b,c,设S是△ABC的面积,若
﹣
,则角A的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dfa04ed69eb5e36931c076e0cf3f01e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8317ba50fc6349ba55dc6be57680078.png)
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解题方法
2 . 在
中,角
所对的边为
,若
边上的高为
,当
取得最大值时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7112e7ccb1eb90facfa5182ea763970a.png)
__________ .
![](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/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c60873f0a244a0db37c990266107ffe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db76f2c34eb81a4339580ebc94840d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7112e7ccb1eb90facfa5182ea763970a.png)
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2018-08-29更新
|
1610次组卷
|
3卷引用:江西省南昌市2017-2018学年高三第二轮复习测试卷(六)文科数学试题
3 . 在
中,角
所对的边分别为
,已知
,且
的周长为
,
的面积为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
____ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f774cd650f14c8f6e4fe0c6a432768bb.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.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/b39512787941873298fd1096e5d2b845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8d02ea8c4988c5c28ab93f0d70fb55a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a218e7427d8cf2ed9f5327b2c86d93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f774cd650f14c8f6e4fe0c6a432768bb.png)
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2018-08-06更新
|
1128次组卷
|
4卷引用:6.3 解三角形专项训练
4 . 如图,在
中,
,
,
分别是
,
上一点,满足
,
.若
,则
的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/493139a1c94288bd86f90066527b63da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e8504fe00155e2d969f2a1d33499b5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1a9c6a736e6eac98a676fa3232db5a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2076443ed660ed742706f3bf209f65a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec879d77486af835ca1c46646d27599b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7412481426ec0f57a5fca1e0a4ebdfd5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7e437375b731a097c117c3816f13772.png)
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2018-08-02更新
|
1515次组卷
|
4卷引用:模型1“加线三角形”模型(高中数学模型大归纳)
名校
5 . 锐角
中,
分别为内角
的对边,已知
,
,
,则
的面积为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8120119749d4bc28067e73fca7d46cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f994dcdab3626ccd2c7441a16a6b228c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36311a6dec3fd5f0c8f1e1157fa65ad3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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2018-07-25更新
|
975次组卷
|
8卷引用:2017-2018学年度下学期高中期末备考 【浙江版】高一【精准复习模拟题】 拔高卷01【教师版】
(已下线)2017-2018学年度下学期高中期末备考 【浙江版】高一【精准复习模拟题】 拔高卷01【教师版】河北省枣强中学2017-2018学年高一上学期期末考试数学(理)试题河北省定州中学2017-2018学年高一(承智班)下学期开学考试数学试题河北省衡水中学2018届高三十五模数学(文)试题【全国百强校】山西省临汾第一中学校2017-2018学年高二下学期期末考试数学(文)试题广东省广州市执信中学2018-2019学年高二下学期期中数学(文)试题安徽省淮南市第一中学2019-2020学年高一下学期期末数学试题(已下线)6.4.2 正余弦定理(精练)-2020-2021学年高一数学一隅三反系列(人教A版2019必修第二册)
6 . 若
的面积为
,且∠C为钝角,则∠B=_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0864876d3bd75a14e8fae15b2e334ab.png)
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名校
7 . 在
中,
,
,若
的面积等于
,则边长
为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59e29b822cda1ba926e96368094fa1a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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2018-07-12更新
|
738次组卷
|
6卷引用:第47练 计算基础综合训练7
8 . 在
中,角
的对边分别为
,已知
=
=
的面积为4,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0aaf618d9d72fe536f478a86e54b11e.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516983449108347c9bbf5dd2a72ab3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90d7f054e8f0346479e1999622f11cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/004f4b906eaf04e79a91707fabb6fc4c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d5e9cd1e169436feecee270180f82fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f660f79c4af0d0a07429e04c98c93187.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0aaf618d9d72fe536f478a86e54b11e.png)
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9 . 在
中,角
的对边分别是
,已知
,若角
为锐角,则
的面积为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/516983449108347c9bbf5dd2a72ab3dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d90d7f054e8f0346479e1999622f11cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b3ad013effb9e4363cb32190b44f55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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