名校
1 . △
内接于半径为2的圆,三个内角
,
,
的平分线延长后分别交此圆于
,
,
.则
的值为_____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18722354086c42e62334983fc50eb6a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97c01fdc7bc471af0b264a04aef0823e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1241216f3c1cb5e73043dd1037f556d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5dc69fbf683181f9f2c8205a73dd4b4.png)
![](https://img.xkw.com/dksih/QBM/2021/4/15/2700211155566592/2806747262025728/STEM/be8d76a82ba847a8b8a5edc9dfe8e517.png?resizew=217)
您最近一年使用:0次
名校
解题方法
2 . 体积为
的三棱锥P-ABC的顶点都在球O的球面上,PA⊥平面ABC,PA=2,∠ABC=120°,则球O的体积最小值为_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
您最近一年使用:0次
2020-09-05更新
|
509次组卷
|
3卷引用:福建省厦门一中2020-2021学年高一下学期期中考数学试题