名校
解题方法
1 . 在
中,内角
的对边分别为
,已知
.
(1)证明:
;
(2)若
,求
边上的高.
![](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/21050906dc1e83148230696478082f1a.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e11bc495f7cca0687c368a2cf059c78.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/302fb4d1dacf1d2b479f1c5739b9b321.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
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2020-09-23更新
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1410次组卷
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7卷引用:河北省石家庄二中2019-2020学年高二下学期期末数学试题