1 . 在①
;②
;③
这三个条件中任选一个,补充在下面问题中,并给出解答.
问题:在
中,角
、
、
的对边分别为
、
、
,
,
,且______ ,求
的面积.
注:如果选择多个条件分别进行解答,按第一个解答进行计分.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/430562e0042f33f1c5da78299d8d8212.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6fa1c1353475099fd66b37518cc21a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7dfbb0a103a76db264b9e74183a34bc.png)
问题:在
![](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/887956f4cf7640b4087fdd34e1e7821e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b71812e0762c0aaffb51cfef66156567.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
注:如果选择多个条件分别进行解答,按第一个解答进行计分.
您最近一年使用:0次
2023-04-23更新
|
1558次组卷
|
3卷引用:青海省玉树州2023届高三第三次联考数学文科试题
2 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ae5cb0f5d048f7d3db6ab62c37ce1c.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9202c949edce7ce9f7332afc6629cef0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41ae5cb0f5d048f7d3db6ab62c37ce1c.png)
您最近一年使用:0次
名校
解题方法
3 . 已知椭圆
的左、右焦点分别为
,
,点P是C上的一点,
,
,则C的离心率是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/851a5d6ec23256f9b4a9e98aa92945fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5076289823db419f94e9c0c8f4aafd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3fb78c5f885034612c0e030b920143d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8fe5b227b71e882ba351963360650b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54058d8ebebd0449a3f6a6bb8358ce3f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2022-02-15更新
|
630次组卷
|
5卷引用:青海省玉树州州直高中2021-2022学年高三下学期第三次大联考数学(文科)试题