题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040012-70732.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040013-69111.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040013-66023.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040013-42760.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040013-27437.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040013-71289.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040014-23637.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040014-60522.png)
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040014-36229.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040014-91253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040014-58245.png)
点评:本题求解主要用到的是三角形中的正弦定理:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040015-23984.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040015-44395.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040005-67239.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040006-17456.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040006-91353.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040006-34493.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040006-14449.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040006-54592.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040007-69629.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040007-35635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035959-43375.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035959-87370.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035959-25248.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035959-22333.png)
(1)求角
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035959-98869.png)
(2)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040000-32906.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020040000-42468.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035948-79506.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035949-73567.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035949-66951.png)
(1)求函数
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035949-18116.png)
(2)已知
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035949-20120.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035950-22487.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035950-95399.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035938-74208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035938-23549.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035938-74208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035939-54773.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035939-75689.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035938-74208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035939-27613.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035938-74208.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035939-79335.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035940-94752.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035940-45622.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035940-34448.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035939-75689.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035940-27153.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035940-26547.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035932-49253.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035933-39227.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035933-47659.png)
①△A1B1C1是锐角三角形;②△ABC是钝角三角形;③sinA>cosB
④
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035933-62098.png)
⑤若c=4,则ab<8.
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