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解题方法
1 . 根据下列条件,求三角函数值
(1)已知
,且
为第二象限角,求
的值;
(2)已知
,求
的值.
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e92852189b59df2d81484fa33ff0f9cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80248fbe015c5f065d80227fa35711e9.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1a373d932dd938980fefafb7aff9b8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfb38f7d091297ede831f579c0c107d1.png)
您最近一年使用:0次
2022-11-30更新
|
2034次组卷
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5卷引用:北京市朝阳区第二外国语学院附属中学2022-2023学年高一上学期期中考试数学试题
北京市朝阳区第二外国语学院附属中学2022-2023学年高一上学期期中考试数学试题宁夏银川市贺兰县景博中学2022-2023学年高一上学期第二次月考数学试题山东省滕州市第五中学2022-2023学年高一上学期第二次线上考试数学试题(已下线)专题5.2 三角函数的概念与同角三角函数的基本关系(5类必考点)-2022-2023学年高一数学必考点分类集训系列(人教A版2019必修第一册)(已下线)专题08 三角函数的概念与诱导公式(1b)-期中期末考点大串讲
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2 . 在
中,角
,
,
的对边分别为
,
,
,
,
,
.
(I)求
;
(II)求
的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.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/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc8c65bea2c80af038768b74250c694e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3771d75e3f7ca669eda095c90ee68bfc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019eb94a6a2b38308811470d860e1a20.png)
(I)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
(II)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
您最近一年使用:0次
2018-11-15更新
|
456次组卷
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3卷引用:【市级联考】北京市朝阳区2019届高三上学期期中考试数学理试题