已知
,求下列各式的值:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de0e180ef261881872e9b6cdcca762c0.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40fc8654ee8780a773a0a58de223a748.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66c8731237f5ace97557019f0b39c38c.png)
20-21高一下·上海长宁·期中 查看更多[3]
上海市建青中学2020-2021学年高一下学期期中数学试题(已下线)试卷21(第1章-7.2 三角函数概念)-2021-2022学年高一数学易错题、精典题滚动训练(苏教版2019必修第一册)(已下线)上海市华东师范大学第二附属中学国际部(紫竹校区)2021-2022学年高一下学期期中数学试题
更新时间:2021-09-05 15:05:25
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【推荐1】已知
,求下列各式的值:
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(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/98f45a9b37ba7447d617428f7183eab6.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eb377ef081c8b1c46aa3d57174846a5.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d0ae1419698091ac757d9af7f8ecf71.png)
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【推荐2】(1)若
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8d4690a46dce144f1a1fe565e14df009.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/236eb41bf50b7c6c051c08071841aebb.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef92d8eafbac67a61f262b256687575d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/281805b9dfe2162215dfe6b5ad6d7b03.png)
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【推荐1】计算下列题:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3687206a1e0c1d543e60e1346fef7f92.png)
(2)化简
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3687206a1e0c1d543e60e1346fef7f92.png)
(2)化简
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf6e7f1cecc29e9f1711021be3613fbb.png)
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【推荐2】已知平面直角坐标系上的三点
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d394016b9fecac73f38cbc4ff18dee2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969b106918cf44777d177a0538da8cb3.png)
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解题方法
【推荐1】求下列各式的值:
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(2)
;
(3)
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(4)
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(5)
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(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/552dd0ec0fd08f1dd641e6f98f7389bc.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30653b7d13b9e1fa8e3dd31c2e8327b8.png)
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(4)
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(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8aa555968a6498108e1f4509ab7956e.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c250fe1c224bec6e60c071d89fe7ee85.png)
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【推荐2】已知
.
(1)求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04ca12d48fa0e62e8e17ebdda4fa661a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa404481d8b9e19f2160632ef08283f7.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94ba362db0e1e1c0d0304b7289ecec65.png)
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