1 . 已知△
的三个内角
、
、
所对应的边分别为
、
、
,复数
,
,(其中
是虚数单位),且
.
(1)求证:
,并求边长
的值;
(2)判断△
的形状,并求当
时,角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.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/5a0bf9b2a7378e73e9fd06c693bfda07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2797017e76719c6487dc068b75ba6316.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a7035cd4adda5d72a9fc9f9fda75995.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/618bf05dc0d5107105990b4f179c153d.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30efecee2afdad0e08cef68030d616e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
(2)判断△
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5742b2684d00be50a66e01c9acb6b51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
您最近一年使用:0次
2018-12-30更新
|
504次组卷
|
2卷引用:2019年上海市长宁(嘉定)区高三上学期期末质量检测(一模)数学试题
2 . 已知
,
,且
.
(1)求
;
(2)若
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707aed47159fae11f47e464c548a0b95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5aa93227f7a61c49471aa7e07133f553.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d3e0c83b24099774ffab70417c5abd1.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82eac2216e0793ab279575131ba76039.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e22731b0af7f6328a19939a5d2d46149.png)
您最近一年使用:0次
3 . 已知
,且满足
.
(1)求
;
(2)若
,
,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/255483db09b1e523a4fcc1f618b98ec4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/815bb5d5fb1456120cbf8fc397a06a34.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e81e59019989b7dc2fb59b037ef6e010.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2725a89d93c791f7a0098f4964587905.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca50f6e458e5a85aabc950bd7fe3bbe9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/575eaf40e9dd07b5450ecc1b0d0bb95c.png)
您最近一年使用:0次
2018-05-24更新
|
332次组卷
|
6卷引用:上海市吴淞中学2018-2019学年高二上学期期末数学试题
上海市吴淞中学2018-2019学年高二上学期期末数学试题上海市南洋模范中学2016-2017学年高二下学期期中数学试题上海市金山中学2015-2016学年高二下学期第一次月考数学试题(已下线)专题3.3 复数【易错题型专项训练】-2020-2021学年高二数学下学期期末专项复习(沪教版)【全国百强校】山东省济宁市第一中学2017-2018学年高二下学期期中考试数学(文)试题沪教版(2020) 必修第二册 新课改一课一练 期末复习A