题目
题型:不详难度:来源:
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004658-82282.png)
解析
试题分析:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004658-86441.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004658-56901.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004659-33191.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004659-72853.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004659-41443.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004659-90787.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004659-40175.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004700-58860.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004700-19461.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004658-82282.png)
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004637-63047.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004637-55965.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004638-22937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004638-92430.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004638-97312.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004638-68481.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004638-70619.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004638-35645.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004638-31041.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004638-46569.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004639-48514.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004639-66404.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004639-26737.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004628-47454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004628-47454.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004628-15910.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004628-72045.png)
(2)若AC=1,求直线AM与平面VAC所成角的大小.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004629-40638.jpg)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004555-28680.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004555-71696.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004555-74227.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004555-18746.png)
(1) 求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004555-97326.png)
(2) 若直线
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004555-20641.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004555-95767.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004555-75729.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004555-76313.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004556-87781.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004537-75168.png)
(1)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004537-21602.png)
(2)求二面角
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004537-48310.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004538-20207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022004530-42296.png)
(1)求证:AN∥平面 MBD;
(2)求异面直线AN与PD所成角的余弦值;
(3)求二面角M-BD-C的余弦值.
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