名校
1 . 已知向量
,
,
,且
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93f06ce0675b98acbc28c2392460117f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90b102cc8f9f598b9dc96f2138ee5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5772da5629e971c13b19a3601b1308fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb58883caf5c8ca1e94389839d294b6.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433877d755eb8dce707299d1c4eb7186.png)
您最近一年使用:0次
2019-07-06更新
|
930次组卷
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3卷引用:黑龙江省大庆市铁人中学2017-2018学年高一下学期开学考试数学试题
名校
2 . 已知
中,内角
所对的边分别为
,其中
, ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7302208f124e904963d387fec881a7.png)
(1)若
,求
的值;
(2)若
边上的中线长为
,求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6fd454e69236d3ece1583420fb552e07.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad7302208f124e904963d387fec881a7.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60b97bb18e5ca34d22b5e827316a122a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/51c181f86de3c96a7ef7a1a04c3a438f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d209864dcb5c839ea7c485a9de05474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
2018-08-06更新
|
2742次组卷
|
6卷引用:安徽省合肥市一六八中学2018-2019学年高二上学期入学考试数学试题