1 . 在
中,
,
,
.
(
)求
的长.
(2)求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09eebab59213386449a726b75065bf76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ffe7a93172d308a58200e3c722fe1072.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef0402dd5ae3db10281f9f1e11738bcb.png)
(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
您最近一年使用:0次
2018-03-19更新
|
244次组卷
|
2卷引用:北京西城31中2016-2017学年高一下期中数学试题
2 . 在
中,
、
为锐角,角
、
、
所对的边分别为
、
、
,且
,
.
(Ⅰ)求
的值.
(Ⅱ)若
,求
、
、
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/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/a07fcfd5d22629a729e21052aafc2fd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f4fa13477ff09b4ea177c4c40163022.png)
(Ⅰ)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/216a6d52921535d420734f9f7dc3774a.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c6171056a3db6d707cd83fe8efa5ba7.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)
您最近一年使用:0次
名校
3 . 在△
中,角
的对边分别为
,且
,
.
(Ⅰ)求角
的大小;
(Ⅱ)若
,
,求
和△
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9c0a9365a01b868d6225450eb46e741.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/445879ed01b23c4b0bf04354ab2882ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce613eaa5df46a50174085ef5d1087fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6298a66404f5083188db75dcfd07b18.png)
(Ⅰ)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4580cc037c0c760c728cdbb74a8154c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
您最近一年使用:0次
2017-05-12更新
|
674次组卷
|
4卷引用:北京市西城区第13中学2018届高三上学期期中考试数学试题2
4 . 在
中,角A,B,C所对的边分别为a,b,c.已知
.
(Ⅰ)求A的大小;
(Ⅱ)如果
,求a的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f570a35ee91d04ac3587acd8fef3d1f.png)
(Ⅰ)求A的大小;
(Ⅱ)如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8a7e5e0ddbb6771296ce5cf57be4c20.png)
您最近一年使用:0次
2016-12-02更新
|
1658次组卷
|
6卷引用:2014届北京市西城区高三一模理科数学试卷
(已下线)2014届北京市西城区高三一模理科数学试卷(已下线)2014届北京市西城区高三一模文科数学试卷人教A版 全能练习1.2 余弦定理青海省西宁市湟川中学2019届高三上学期第三次月考数学试题2019年青海省西宁市城西区青海湟川中学高三上学期6月月考数学试题上海市南洋模范中学2015-2016学年高一下学期期末数学试题
5 . 在
中,
分别为角
所对的三边,已知
.
(Ⅰ)求角
的值;
(Ⅱ)若
,
,求
的长.
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572242164064256/1572242170028032/STEM/90f76b5399044184aa4f27f3791761e8.png?resizew=45)
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572242164064256/1572242170028032/STEM/40afbc2feba04d87a56ff329705ee383.png?resizew=60)
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572242164064256/1572242170028032/STEM/8a06d6876ff4454b9725a309cc31a4ff.png?resizew=69)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d8efa68261ad216ef40410e7a3e23f7.png)
(Ⅰ)求角
![](https://img.xkw.com/dksih/QBM/2015/9/25/1572242164064256/1572242170028032/STEM/210ea850103241099b58afc3d5727727.png?resizew=16)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eebe90200db9f0a99c09e7604159ced9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dd8c5df2bb8f557b385907c8e7088c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3aa688caadfeb5bdf9c7dfecb5afa31.png)
您最近一年使用:0次
2016-12-01更新
|
1212次组卷
|
6卷引用:北京市第十五中学2018-2019学年高一下学期期中数学试题
北京市第十五中学2018-2019学年高一下学期期中数学试题(已下线)2012届全国大纲版高三高考压轴卷理科数学试卷(已下线)2013届中国人民大学附属中学高考冲刺八理科数学试卷2015-2016学年浙江金华、温州、台州三市部分学校高一下期中数学卷吉林省实验中学2016-2017学年高一下学期期中考试数学试题四川省绵阳市涪城区南山中学2019-2020学年高三上学期09月月考数学(理)试题