(1)设两条异面直线
的方向向量分别为
,求直线
与直线
所成的角的大小.
(2)设直线
的方向向量为
,平面
的法向量为
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac182876689b6fb152584d36c457e527.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)设直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/943b14c3138e9b0929b34ad6c48459f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb90e56c0f605ad6d6c97de4203b3dce.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
更新时间:2023-11-15 20:13:42
|
相似题推荐
解答题-问答题
|
适中
(0.65)
名校
解题方法
【推荐1】如图,在四棱锥
中,底面
是边长为1的正方形,
底面
,且
,点
在线段
上,且
.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/ff39eb26-7022-4356-8bd1-51caf948820b.png?resizew=166)
(1)求
与
所成的角的余弦值;
(2)求平面
与平面
夹角的余弦值;
(3)求点
到平面
的距离.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0585b6c0f156eecf9662b9846d4eb693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5f1897a7e856b42f8cee0f286ad913d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5064f5ce5ac8428e277fd578da84ec6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5861b1a4a94ec85258132679fb28050.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/2/ff39eb26-7022-4356-8bd1-51caf948820b.png?resizew=166)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.png)
(2)求平面
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0628681907ac8d7fdb94d8bc1b15feb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
(3)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c66d99a6a8415ddad22bbed33b64cfb.png)
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解答题-问答题
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适中
(0.65)
解题方法
【推荐2】如图,在棱长为3的正方体ABCDA1B1C1D1中,A1E=CF=1.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/36e7f54f-4bb1-43c4-994d-ccd8368aab29.png?resizew=177)
(1)求异面直线AC1与D1E所成角的余弦值;
(2)求直线AC1与平面BED1F所成角的正弦值.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/23/36e7f54f-4bb1-43c4-994d-ccd8368aab29.png?resizew=177)
(1)求异面直线AC1与D1E所成角的余弦值;
(2)求直线AC1与平面BED1F所成角的正弦值.
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解答题-证明题
|
适中
(0.65)
【推荐1】如图,在三棱柱
中,底面
是边长为2的等边三角形,平面
交
于点
,且
平面
.
![](https://img.xkw.com/dksih/QBM/2018/1/22/1865740471566336/1866078446338048/STEM/98adb7febab44a9494ed8cd041463f3e.png?resizew=140)
(1)求证:
;
(2)若四边形
是正方形,且
,求直线
与平面
所成角的正弦值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/78ffb5ad6ffc45a3ce3659e2544b79e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74bca84ad86c648d3bb20c8909c8da3f.png)
![](https://img.xkw.com/dksih/QBM/2018/1/22/1865740471566336/1866078446338048/STEM/98adb7febab44a9494ed8cd041463f3e.png?resizew=140)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
(2)若四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8b5a6dbcf05f572f83f51abf7d668c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/35c5aa738865bade7eb71bed5b7e4cd1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10d8eb4a9f462ca0c1d49c3fe91e720d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee8b5a6dbcf05f572f83f51abf7d668c.png)
您最近一年使用:0次
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【推荐2】如图,在四边形ABCD中,AB//CD,∠ABD=30°,AB=2CD=2AD=2,DE⊥平面ABCD,EF//BD,且BD=2EF.
(Ⅰ)求证:平面ADE⊥平面BDEF;
(Ⅱ)若二面角C
BF
D的大小为60°,求CF与平面ABCD所成角的正弦值.
(Ⅰ)求证:平面ADE⊥平面BDEF;
(Ⅱ)若二面角C
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bfc339cf6dd66599db64fa3fa44e608.png)
您最近一年使用:0次
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(0.65)
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【推荐3】如图,在直三棱柱
中,
,
,
,
交
于点E,D为
的中点.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8b7d097b-f822-4dd5-87f9-5e5bcdf34105.png?resizew=133)
(1)求证:
平面
;
(2)求直线
与平面
所成角的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c3e9ef3e849788645552cfb0735d987.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55a2310cbba5e050488cd9296eb195d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36c4559d27e3905980d1a4f1856f07de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b664648ccc5b678bf23e8b9e30143f66.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2777840758e70e7dbbc18cef8f3d6d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d88bf46ad08f9677c37eed1d0369329.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/16/8b7d097b-f822-4dd5-87f9-5e5bcdf34105.png?resizew=133)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/662698361c6b3ddaf0c28a3c87be53e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
(2)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87cdc08e1c4a04a18d5ecea03393e36d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a211ad5a06b505b8365a62c1946f3cb7.png)
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