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解题方法
1 . 已知
.
(1)求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9a7de5b70003502e40b95b3b7d3d933.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa0f988b8fb048add08731872423a9.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d325e280e2faa976dd3c877c7922c61e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59dd9042cf85411bb0b27c49d76f18e2.png)
您最近一年使用:0次
2022-07-08更新
|
349次组卷
|
2卷引用:天津市第四中学2022-2023学年高二上学期入学摸底考试数学试题
解题方法
2 . 在
中,角
所对的边分别为
,且
.
(1)求
的值;
(2)若
,试求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.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/f04fe54af2f0ae3eb85ebcfcf901fb0d.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be0bb9e49f8f8a2cd06311bbc45eaadd.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6cb284a679703e0271a04f0c30f63c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
解题方法
3 . 已知
,则![](https://img.xkw.com/dksih/QBM/2016/9/21/1573035383857152/1573035389771776/STEM/3426c03292e44d329e598452c63ea1be.png?resizew=51)
____ .
![](https://img.xkw.com/dksih/QBM/2016/9/21/1573035383857152/1573035389771776/STEM/8d36c5d314e64098be4d52e398c47708.png?resizew=167)
![](https://img.xkw.com/dksih/QBM/2016/9/21/1573035383857152/1573035389771776/STEM/3426c03292e44d329e598452c63ea1be.png?resizew=51)
您最近一年使用:0次