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解题方法
1 . 如图,在四棱锥P-ABCD中,底面四边形ABCD是边长为12,
的菱形,侧面△BPC是
的等腰直角三角形,M为PD的中点,且平面BPC⊥平面ABCD.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/5e700984-97e6-4b6a-84a6-beb05519f20f.png?resizew=232)
(1)求线段AM的长;
(2)求直线AM与平面PBD所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5b8b98b2f83279a49e94d9f48c5e6f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bba8e0d0a84be821e404c93852543ca.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/8/5e700984-97e6-4b6a-84a6-beb05519f20f.png?resizew=232)
(1)求线段AM的长;
(2)求直线AM与平面PBD所成角的正弦值.
您最近一年使用:0次
2022-05-27更新
|
225次组卷
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3卷引用:陕西省西安市八所重点中学2021-2022学年高三上学期联考 (一)理科数学试题
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2 . 如图,长方体
中,
,
,以A为球心,
为半径作球面,点
为球面上一动点,则
的最小值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8745717601cd14b46c2298919b41b502.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1a56baf43ffdf67bc8460856e31fec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c3f8addf7c9c3d71dcc8af10f81929c.png)
![](https://img.xkw.com/dksih/QBM/2020/11/25/2600465124360192/2602157632299008/STEM/40d6b0068b264e7491f148f671ebc744.png?resizew=261)
您最近一年使用:0次
2020-11-27更新
|
224次组卷
|
2卷引用:陕西省咸阳市武功县普集高级中学2022-2023学年高三上学期11月阶段性检测理科重点班数学试题
3 . 已知正方体
的棱长为
,动点
在正方体表面上且满足
,则动点
的轨迹长度为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc168963a7ee259a2c2bf112f05e7718.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次