题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010832-72306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010832-94549.png)
答案
解析
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010833-86940.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010833-54325.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010833-29218.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010833-52987.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010833-10305.png)
【考点定位】本题考查的是解三角形,考查余弦定理的应用。利用题目所给的条件列出方程组求解
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010826-13801.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010826-67574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010826-88407.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010826-65177.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010826-97501.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010827-18858.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010827-71870.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010827-82119.png)
(1)求角
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010826-88407.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010827-63789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010827-18858.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010821-63897.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010821-34161.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010821-97399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010817-32931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010817-53166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010817-54119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010817-54119.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010817-82528.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010817-32931.png)
面积为
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010818-35100.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010818-86508.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010809-60645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010809-70306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010810-49644.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010809-70306.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010810-49644.png)
(Ⅰ)求角
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010810-85499.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010810-51542.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010810-11380.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010804-12474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020010804-28484.png)
A.-![]() | B.![]() | C.-2 | D.2 |
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