名校
1 . 如图,几何体
中,
为边长为2的正方形,
为直角梯形,
,
,
,
,
.
![](https://img.xkw.com/dksih/QBM/2016/12/9/1579071702769664/1579071703343104/STEM/3601e823d4cc4f3093d239767be9a045.png?resizew=216)
(1)求证:
平面
;
(2)求二面角
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2fc1129846f37afdafd751627c450d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b32c05247f6998d7a70d31d13be4148c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f79863ffcfa63117ca6741b20a48e69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a0e5697eca3f5205cb7b343648240bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09d27bd71d79cb19eb554175e4ef0867.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d2c15801fee2405573677484f5dcfa4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0eb476b0dac9799c720354d30b3a85c9.png)
![](https://img.xkw.com/dksih/QBM/2016/12/9/1579071702769664/1579071703343104/STEM/3601e823d4cc4f3093d239767be9a045.png?resizew=216)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e56fdf217165748fafe938b64fa08179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2db1674add0f4a1a24f5ed893b1c5d0.png)
(2)求二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe77669ea3c68d6397b255e6251e911.png)
您最近一年使用:0次
2016-12-13更新
|
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5卷引用:重庆市第三十七中学校2018-2019学年高二下学期期中(理)数学试题
9-10高二下·重庆·期末
真题
名校
2 . 如图,在棱长为1的正方体
中,
是侧棱
上的一点,
.
(1) 试确定
,使直线
与平面
所成角的正切值为
;
(2) 在线段
上是否存在一个定点
,使得对任意的
,
在平面
上的射影垂直于
,并证明你的结论.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd694ad3a4733c7c84aaa7946aeea4de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b094e639c2b31dc54b1b3e6456e77843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd8aea5990d11349b7b501b0b6354eae.png)
(1) 试确定
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e9a6fdace0b9732f7da0fc227012a0fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee79a802be8015298f4522b7439a881b.png)
(2) 在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bebb9d0950db392cbe960641f648df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb2b7f786f7c268cded3a16dac433ce9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f5e728df8f218e4adcfc7fc4ebcf83d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80672dda9430cb42b3136bcb1b67bbad.png)
您最近一年使用:0次
2016-11-30更新
|
883次组卷
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5卷引用:重庆市杨家坪中学09-10高二下学期质量检测数学试题
13-14高三上·江苏盐城·阶段练习
名校
解题方法
3 . 如图长方体
中,底面
是正方形,
是
的中点,
是棱
上任意一点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/6f5798b9-2fcb-49d6-9da1-df593f980085.png?resizew=162)
⑴求证:
;
⑵如果
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7fdae2749f537f9308d067c1fec19d36.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632f2bf1cd0435041fa04b01901d1c8c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/13/6f5798b9-2fcb-49d6-9da1-df593f980085.png?resizew=162)
⑴求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d7788f70d6ada894a892fc4f2474ef27.png)
⑵如果
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8df109566d082b8fc65e44f5db40852c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
您最近一年使用:0次
2016-12-02更新
|
859次组卷
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7卷引用:重庆市铜梁县第一中学2017-2018学年高二10月月考数学(理)试题
真题
4 . 四棱锥S—ABCD中,底面ABCD为平行四边形,侧面SBC⊥底面ABCD,已知
∠ABC = 45°,AB=2,BC=
,SA=SB =![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)证明SA⊥BC;
(2)求直线SD与平面SAB所成角的大小.
∠ABC = 45°,AB=2,BC=
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95bacae35b6e16a0a33c2bdc6bc07df7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)证明SA⊥BC;
(2)求直线SD与平面SAB所成角的大小.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/30/7a2a847a-2350-4732-a70c-b146a0a8a808.png?resizew=167)
您最近一年使用:0次
2016-11-30更新
|
1861次组卷
|
5卷引用:重庆市缙云教育联盟2022-2023学年高二下学期期末数学试题