题目
题型:不详难度:来源:
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015649-66581.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015649-12329.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015649-20002.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015649-78120.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015649-62797.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015650-24803.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015649-66581.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015650-76213.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015650-39978.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015650-33741.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015651-82308.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015651-64989.gif)
答案
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015651-97537.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015651-77830.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015651-35231.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015652-61821.gif)
解析
核心考点
举一反三
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015641-10357.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015641-99454.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015642-10555.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015642-45154.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015642-98194.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015642-97554.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015642-38686.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015643-24436.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015643-76545.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015643-44794.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015643-89893.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015644-21134.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015634-70846.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015634-27073.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015635-80574.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015635-87606.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015635-61139.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015635-34719.gif)
![](http://img.shitiku.com.cn/uploads/allimg/20191022/20191022015636-95751.gif)
![](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° |
![](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)
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