在三棱锥
中,PA⊥底面ABC,AC⊥BC,若
,二面角
的大小为60°,三棱锥
的体积为
,则直线PB与平面PAC所成角的正弦值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494529576e5b2b25074fcc7986c52a61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b796bbaeb8450404c2d146283562006e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63397cda22cb1fad59cf966dfb588643.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee97edaf00d47f50b26ea8bc855ab0b6.png)
更新时间:2022-10-17 12:25:44
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