名校
解题方法
1 . 已知
外接圆
的半径为
,且
,
,从圆
内随机取一个点
,若点
取自
内的概率恰为
,则
的形状为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46b8aa97d5c8101df3f6fb1e5d52f2f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80a6d17b628f3e91f2a6ebae3fc831fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae7fc0917ce3636c101b0d5fb42a6671.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
A.直角三角形 | B.钝角三角形 | C.等边三角形 | D.等腰直角三角形 |
您最近一年使用:0次
名校
2 . 已知向量
,
,且
的夹角是钝角,则实数t的取值范围是__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e350fdc82792055eb76eba321a7b7417.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9040d180a8a705a801a0a71df8c06c51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
您最近一年使用:0次
名校
3 . 已知向量
.若向量
与
的夹角为锐角,则实数
的取值范围为_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b445b85dcc07ac07577b50190e1f56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ea1f268299d57e5362182760a5961af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96b37b1b1c2803e723337c20b554c5cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2019-06-05更新
|
931次组卷
|
3卷引用:【全国百强校】安徽省六安市第一中学2018-2019学年高一下学期第二次阶段检测数学(文)试题
4 . 设
的外心
满足
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a27dc396251a4453094d19baa79816.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e745e7394aa9d9cfa980f8766ad1661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/10a27dc396251a4453094d19baa79816.png)
您最近一年使用:0次
2019-01-11更新
|
903次组卷
|
3卷引用:2019届陕西省宝鸡市高三2月模拟考试数学(理)试题