题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053242-87646.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053242-86087.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053243-81282.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053243-21374.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053243-40422.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053243-32883.png)
答案
解析
由正弦定理得:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053243-39724.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053244-40277.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053244-50470.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053244-26497.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053235-90235.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053235-18497.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053235-92505.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053236-26931.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053236-49787.png)
A.垂直 B.平行 C.重合 D.相交但不垂直
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053229-27469.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053230-65383.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053230-43986.gif)
(1)求边
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053230-86418.gif)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053229-27469.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053230-10644.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053231-58210.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053223-21354.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053224-30214.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053224-33546.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053224-33848.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053224-47142.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053224-22962.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053218-76664.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053218-36264.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053218-90559.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053219-14881.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053219-67025.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053219-49534.png)
A.30° | B.60° | C.120° | D.150° |
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053208-41289.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053208-88631.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053208-66363.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053209-73450.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053209-76936.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053209-44078.gif)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053209-77302.gif)
(2)当
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053209-74802.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053210-77544.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053210-18712.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020053210-14907.gif)
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