题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015631-68158.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015632-34063.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015632-60545.png)
A.90° | B.60° | C.45° | D.30° |
答案
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015628-20942.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015628-90630.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015628-60584.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015628-78888.png)
.
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015620-64635.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015620-90232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015620-24346.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015620-90232.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015620-52617.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015621-28834.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015621-87038.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015621-50937.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015621-79207.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015621-69776.png)
(1)求
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015622-99144.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015620-90232.png)
(2)求平面PBD与平面ABCD所成角的正切值。
(3)求证:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015622-71501.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015622-43574.png)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015615-82714.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015615-35340.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015615-89443.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015615-89443.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015615-24728.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015615-89443.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015611-97016.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015611-79604.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015611-11471.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015612-73824.gif)
A.![]() | B.![]() | C.![]() | D.![]() |
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015604-95578.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015604-11260.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015604-30844.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015604-66261.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015604-59489.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015605-37643.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015605-42289.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015605-91027.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015605-45798.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015606-68524.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015605-37643.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015606-50064.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015606-57500.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015606-62847.gif)
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