1 . 如图,已知二面角
的棱l上有A,B两点,
,
,
,
,若
,
,有以下结论:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/27d139f7-0857-41b8-85e9-3fdd535e919c.png?resizew=182)
(1)直线AB与CD所成角的大小为
;
(2)二面角
的大小为
;
(3)三棱锥
的体积为
;
(4)直线CD与平面
所成角的正弦值为
.
则正确结论的序号为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754bbd99327195520a4ca3ce3b9a0577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4cc2f3dcb248fc764614be3a9ddd25b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c638fb895acd987140d0ca6bef097499.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaccf1887c4b530fd86a2f0f199c6797.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb0a2d7d40a6c0bf1fddb802db381689.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e9b9d23b4f8dd581461004689d0b863.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/321f96c4f808afe67cf565ca74ae0351.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/31/27d139f7-0857-41b8-85e9-3fdd535e919c.png?resizew=182)
(1)直线AB与CD所成角的大小为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a97bb4dcfab4ec7539bc783d563c49.png)
(2)二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/754bbd99327195520a4ca3ce3b9a0577.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
(3)三棱锥
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891579e7c231584a8e16b8eeff79888e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
(4)直线CD与平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa42621cd6793e7f3673fdb49bc3123.png)
则正确结论的序号为
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4卷引用:山东省菏泽市2021-2022学年高一下学期期末数学试题
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