题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035720-73583.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035720-27723.png)
设向量
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035720-39794.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035721-61480.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035721-53551.png)
(Ⅰ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035721-46662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035721-24927.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035720-73583.png)
(Ⅱ)若
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035721-46662.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035722-84071.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035722-95166.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035722-26023.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035720-73583.png)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035722-35821.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035722-95881.png)
解析
试题分析:证明:(1)∵m∥n∴asinA=bsinB即a•
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035723-64928.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035723-59731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035723-34739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035723-34739.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035723-59731.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035722-95881.png)
点评:向量是数学中重要和基本的概念之一,它既是代数的对象,又是几何的对象,作为代数的对象,向量可以运算,而作为几何对象,向量有方向,可以刻画直线、平面切线等几何对象;向量有长度,可以刻画长度等几何度量问题
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035710-51004.png)
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![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035712-25232.png)
(2)若在
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035712-56951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035712-71323.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035712-57637.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035712-42137.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035712-56951.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035703-64392.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035703-27671.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035703-90815.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035703-26194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035703-26194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035703-26194.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035703-26194.png)
A.(5,0) B.(6,-1) C.(5,-3) D.(6,-3)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035657-17495.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035657-79109.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035657-91859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035657-17495.png)
A.
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035657-91859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035658-97157.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035657-91859.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035658-97157.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035654-12012.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035654-86298.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035654-89843.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191020/20191020035654-94008.png)
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