如图,在正四棱柱
中,
,E为
上使
的点,平面
交
于F,交
的延长线于G.求:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/e4a4e45f-3d8e-4eb9-a717-5f778dc13157.png?resizew=210)
(1)异面直线
与
所成角的大小;
(2)二面角
的正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32a03d1451c639513a259cf96fac6752.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0a851907ada2ac2c3c4880a6736d28a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f8feb05b8c76753d5bd053f254085cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db3ef97d64e58d311019b70fe5e2cc0d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/394c5d2f55221975503be8aa18022480.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/31/e4a4e45f-3d8e-4eb9-a717-5f778dc13157.png?resizew=210)
(1)异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fec5bd77cfc1313bc200480cc66c766.png)
(2)二面角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/489af546514db56f0948c90d76130d8c.png)
更新时间:2022-11-12 11:09:11
|
相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知空间中三点
,
,
,设
,
.
(1)若
,且
,求向量
;
(2)已知向量
与
互相垂直,求
的值;
(3)若点
在平面
上,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b5e428213f946350934bc876fba5514.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daca2df16b221585c93109fd17bc1b5b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b92ecb2412db3b9143c500555c2a0ceb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21841338587f28e2b8adbc39897a145b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04d418c27621284f0b1f68587178adc.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec259c6d0ec4dc8eecf33d5fcea701a2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be2efbf3b0c6a4b941a4bc83098c7cb0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d366d8fbb7258ee051f49977441e14a2.png)
(2)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2b0d6f45010a54e0bfa0b48c90376ebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
(3)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f504623fad7409aa53c842ec25461da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】(1)已知
,且
,求x和y的值
(2)已知向量
,
,且
与
互相垂直,求
的值
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b9393e394d07419c5567feed3c6ee08.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a7d99f6dd7054e287672e5762ed248d.png)
(2)已知向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/309a88adb5c914b9e61b48e7074acdd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7708e56701a6afdd068d0b7b1acd67dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/47db0394d5f11fe68eb90c8512684afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c22ba28c496c63bd22bad9b00be1c3a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在棱长为1的正方体
中,E,F分别为棱
,BD的中点,点G在CD上,且
.
所成角的余弦值;
(2)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22adbc0da438220f9cace11b629d799b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0635059fd390592d1851dfe56c72cd6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2fec5bd77cfc1313bc200480cc66c766.png)
(2)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6795cae2df43a722e1355e9562d93c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b03428a8f91a5674cb8f54766c165f7e.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
解题方法
【推荐2】如图所示的正四棱柱
的底面边长为1,侧棱
,点
在棱
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/a7665637-b7f5-4203-bc7f-ae37ed6b8833.png?resizew=148)
(1)当
时,求三棱锥
的体积;
(2)当异面直线
与
所成角的大小为
时,求
的值;
(3)是否存在
使得点
到平面
的距离为
?若存在,求出
的值;若不存在请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e09725691ee7851f54c0dee86b2bf55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92535536bd3c2761724fd058427f95a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31844aac259cf108a74a7abdb352c9f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/2/a7665637-b7f5-4203-bc7f-ae37ed6b8833.png?resizew=148)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3cf0f585938ede9eca890a6eb326d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e63fa0d9702ebcae364f0d06db855a29.png)
(2)当异面直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/554b3b4c5ce7aca81becc07ed4903736.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53be133b84fe2c6169dc4d2af77aef99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
(3)是否存在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/657dffbd3623b705f871878fbd9df57e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a734873a608f0c070dec80b89d179754.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,已知四棱锥
的底面为边长为2的菱形,且
平面
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/5bc3b438-9e4d-4bc0-ba44-5ce451fbf736.png?resizew=153)
(1)设
为
中点,证明:平面
平面
;
(2)设
,
上是否存在一点
,使得
与平面
所成的角和平面
与平面
的夹角相等?若存在,求出所有满足条件的点
;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccd4fd4b7a4d6b8ca0c5827c055a9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e075468e7fb0bf30229aec01a7205977.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/2/5bc3b438-9e4d-4bc0-ba44-5ce451fbf736.png?resizew=153)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342d452a7b850cd3a15b23619ad39bd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e6c2dad46a9052a4185a4f7b4ae8a2e.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b80ee363635d73f601654339028daec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d50703c46b6153945d718b198f03b4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/176385d91d5e29324fce4a932eff6a79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.65)
名校
解题方法
【推荐2】在四棱锥
中,
平面ABCD,
,
是
的中点,
在线段
上,且满足
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/096feacc-1e5e-4f7c-a3c9-01a83e8bd1bb.png?resizew=161)
(1)求证:
平面
;
(2)求平面
与平面
夹角的余弦值.
(3)在线段
上是否存在点
,使得
与平面
所成角的正弦值是
,若存在,求出
的长;若不存在,请说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a1b49f64e0065edad868b25e9fcada3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f776636841408fcb823467e47c6b52b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb25434985431dcc5c33fcbb3354b786.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/15/096feacc-1e5e-4f7c-a3c9-01a83e8bd1bb.png?resizew=161)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b78172568aac9805d2ea2d5f742bf80c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/840798a31aba0783f96584e0ad7c0d2e.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf3bb23a9c015d1a3ed8bf4c6553f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b5e05a5b8f70d18d22cba3421f29012.png)
(3)在线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e61620a272dada8d4b9a9fab6379dfd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafbe2751f4f4c5a8e676818195e9111.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaf3bb23a9c015d1a3ed8bf4c6553f67.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/827ccf0c04aa941ba20d5f4c6068b46b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61182c456ed7b68095a762967ae47744.png)
您最近一年使用:0次