解题方法
1 . 已知
,其中
.
(1)求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df3356f6ee672aaa3b21ff929a1ed866.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcbe8b4bcd32e5a64ebfd873f8cbb2b.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d0b287e18a75611cab8236c9347c040.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1291e6ed6d42d5f71625ba7bca78b686.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cd1b4795b3f33cbb0f9c164409ad58d.png)
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2024-01-24更新
|
456次组卷
|
3卷引用:贵州省黔东南州2023-2024学年高一上学期期末检测数学试题
贵州省黔东南州2023-2024学年高一上学期期末检测数学试题广东省部分名校2023-2024学年高一上学期期末教学质量检测数学试题(已下线)10.2 二倍角的三角函数 (2)-【帮课堂】(苏教版2019必修第二册)
解题方法
2 . (1)化简:
;
(2)已知
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5bc9f01b06467dc76f71b54cf48350e.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afba7a2285fc6b24d497ba0e1742d8cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42307fbb406d52ffedf60536e2b9297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b56661c5ea798d86e8b63c70d800b079.png)
您最近一年使用:0次
解题方法
3 . 在
中,内角
所对的边长分别为
,
,
,从①
;②
中选择一个作为已知条件,求
(1)
的值;
(2)
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/256b633bc67729ae23268fc17117a0f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb5bac75f36bb1dc5c8190d4dbe681d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d4a93c05337d718428222cced9e91d06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96bdfddc004dd5b3f7c1c373670c3269.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
您最近一年使用:0次
名校
解题方法
4 . 已知
,
.
(1)求
,
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c276b025d8ebd8433210282f9940013f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40c7766e9addbc85d179fb1abcb6e3a0.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3a282d19bf2c827a98d4443330f7ca1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6369cd1db768436809404b1f3c4132c0.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c002ed06ede4fbc7b1062f6527235a1.png)
您最近一年使用:0次
2023-03-08更新
|
248次组卷
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2卷引用:贵州省黔东南州2022-2023学年高一上学期期末文化水平测试数学试题
名校
解题方法
5 . 已知
,
,角β的终边过点
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/078714125ff27a773ded66638044f7b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e1f331c3d96c5812a620e326373747eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c4bb1347753e07dfc3a4a1e5b5cf04.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f7db0f9eead2cffac84b6037f57a86.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a71788c5babc2be5da0b5a2bd000601.png)
您最近一年使用:0次
2022-06-06更新
|
208次组卷
|
4卷引用:贵州省黔东南州2021-2022学年高一下学期期中考试数学试题
名校
6 . 在△ABC中,角A,B,C所对的边分别为a,b,c,已知
.
(1)求b;
(2)求sinA的值;
(3)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7adac1c4fd05c1056c789a5fd5744cb6.png)
(1)求b;
(2)求sinA的值;
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7e437ffb9bff532998c35a9bf756a1e.png)
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2022-03-27更新
|
808次组卷
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3卷引用:贵州省镇远县文德民族中学校2021-2022学年高二上学期期末考试数学(理)试题
解题方法
7 . (1)已知
,
都是锐角,
,
,求
的值;
(2)已知
为锐角,
为钝角,
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f8783429be686df75afcd56e847dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c52354132c36663d2b1e4761bdabb62a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eacde1c42151734fdc60f3001b590de.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6581916f5a65edfea257c804efee007e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f9a269a6b70ee3176b62ad070b1221f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37b4089d966700545804c6b580fe032d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e8077b218b5d170c7ce4de12bbfc7e7.png)
您最近一年使用:0次
2022-02-14更新
|
403次组卷
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2卷引用:贵州省黔东南州2021-2022学年高一下学期期中考试数学试题