题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051320-30315.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051320-43551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051320-45156.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051320-31172.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051320-13793.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051320-43551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051321-30415.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051321-42788.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051320-43551.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051321-63326.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051320-30315.png)
A.![]() ![]() | B.![]() ![]() ![]() | C.![]() ![]() ![]() | D.![]() ![]() |
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051322-89724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051322-39358.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051323-28367.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051323-80858.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051315-45890.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051315-91653.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051316-82726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051316-24547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051309-28949.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051309-55180.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051309-47137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051309-56028.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051310-31897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051310-37202.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051310-34901.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051301-30727.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051302-34465.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051302-17037.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051302-51022.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051302-96067.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051303-18731.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051303-24182.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051303-57380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051253-17105.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051253-71469.png)
(1)求边
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051253-50947.png)
(2)求四边形
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051253-17105.png)
(3)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051253-93610.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051253-74016.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051248-87702.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051248-68556.png)
(Ⅰ) 求cos C的值;
(Ⅱ) 若△ABC的面积为
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051248-13966.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020051248-23044.png)
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