如图所示,点A是平面BCD外一点,AD=BC=2,E,F分别是AB,CD的中点,且EF=
,则异面直线AD和BC所成的角为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e051d14fd6a787387995331f5e6d026.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/e5382a3c-1d98-4253-9d1f-ec5b8ce4f9ef.png?resizew=140)
2019高三·全国·专题练习 查看更多[3]
(已下线)专题8.3 空间点、直线、平面之间的位置关系(练)【文】-《2020年高考一轮复习讲练测》(已下线)专题8.3 空间点、直线、平面之间的位置关系(练)-江苏版《2020年高考一轮复习讲练测》河南省商丘市宁陵县高级中学2021-2022学年高一下学期第二次月考数学试卷(B)
更新时间:2019-12-06 16:59:05
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【知识点】 求异面直线所成的角
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解题方法
【推荐1】如图,把边长为2的正方形纸片
沿对角线
折起,设二面角
的大小为
,异面直线
与
所成角为
,当
时,
的取值范围是___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a282d19bf2c827a98d4443330f7ca1.png)
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名校
解题方法
【推荐2】在正三棱柱
中,
,
,
分别为
,
的中点,平面
过点
,且平面
平面
,平面
平面
,则异面直线
与
所成角的余弦值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42d3a82b8e587ee890467835bc4e854c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f1f229274a6e17977cc047814212589.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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