题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002300-31716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002300-95789.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002300-13229.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002301-61460.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002301-58969.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002301-42257.png)
A.![]() | B.![]() | C.![]() | D.![]() |
答案
解析
试题分析:因为
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002300-31716.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002303-57829.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002303-36153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002303-44634.png)
整理得:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002303-34003.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002304-31071.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002304-24803.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002304-26817.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002250-24337.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002250-51375.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002250-63342.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002250-86626.png)
(1)求角
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002250-30106.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002251-21587.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002251-44288.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002238-18563.png)
(1)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002238-53176.png)
(2)设
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002238-39827.png)
(1)若a=3
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002230-73365.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002230-86401.png)
(2)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002231-79845.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002224-36923.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002224-66474.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002224-95514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002225-71175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002225-16129.png)
A.![]() | B.![]() | C.1 | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002219-95584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002219-43373.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002219-16066.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002220-87273.png)
A.1 B.
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002220-76209.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002220-85726.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020002220-97990.png)
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