解题方法
1 . 若
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a5fade4636211a48e03864988c09227.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39e49129bc80bb9b119c94d81deb177f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef001eeef468ca21ac0cbb23fd135657.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a5fade4636211a48e03864988c09227.png)
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2021-03-24更新
|
88次组卷
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3卷引用:沪教版 高一年级第二学期 领航者 第五章 5.5 二倍角与半角的正弦、余弦和正切(1)
名校
解题方法
2 . 已知向量
,
,
,且
,则
=_________ ,
=_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d084e505d45bb79b7c7489c4ec5c11df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9dd1d33b50ea14a7327885f797c4c674.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c778be6fcf2b9640e11ef46ff9efc3e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ac408a5d33731ec9026a0a0e21d071f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
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名校
解题方法
3 . 已知
、
均为锐角,且
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8807d7a6387cd566aa94f0e1732f4676.png)
_______________
![](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/7d711a2674e87a6a7cf0d93c9eab80fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bc8533532d13b268aae392a5b3a1b3a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8807d7a6387cd566aa94f0e1732f4676.png)
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2020-11-21更新
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1077次组卷
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5卷引用:江苏省南京师大附中2020-2021学年高三上学期期中数学试题
江苏省南京师大附中2020-2021学年高三上学期期中数学试题(已下线)文科数学-学科网2021年高三3月大联考考后强化卷(新课标Ⅱ卷)安徽省滁州市定远县重点中学2020-2021学年高一上学期期末数学试题(已下线)专题18 变幻莫测的三角恒等变换-备战2022年高考数学一轮复习一网打尽之重点难点突破(已下线)10.2 二倍角的三角函数 2020-2021学年高一数学同步课堂帮帮帮(苏教版2019必修第二册)
名校
解题方法
4 . 已知
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e47c5f442a5396024c1852ea84c6c39d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d389afcef8a9767957a0152280e82d3c.png)
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2020-11-02更新
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1031次组卷
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9卷引用:北京市东城区2020届高三第二学期二模考试数学试题
北京市东城区2020届高三第二学期二模考试数学试题巩固练14 二倍角的正弦、余弦及正切-2020年【衔接教材·暑假作业】新高二数学(人教版)(已下线)8.2.3倍角公式练习(1)北京交大附中2019-2020学年高一(下)期末数学试题(已下线)文科数学-学科网2020年高三11月大联考考后强化卷(新课标Ⅰ卷)内蒙古赤峰二中2021届高三5月适应性考试数学(文)试题北京市第十二中学2022届高三10月月考数学试题(已下线)第16节 三角恒等变换江苏省连云港市2022-2023学年高一上学期期末模拟数学试题(2)
20-21高一·全国·课后作业
解题方法
5 . 若
(
),则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd582bfddd59659374aeeeeb93d0505.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9fbf538ae87b660c3a3424729b55d61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a135466eb8ca64d002d0fad36176d1c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbd582bfddd59659374aeeeeb93d0505.png)
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20-21高一上·浙江·单元测试
6 . 已知
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
______ ;![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e2cbd388d1e9fa3604bcc16cb08df5.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c585e1fcab28977d486665237bc4701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3643a2b11663d9cfc99f55b68d103352.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e2cbd388d1e9fa3604bcc16cb08df5.png)
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2020高三·全国·专题练习
解题方法
7 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6949c16730daaf0a77f0257029bf64.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24955c75acbf651aa8945b93f5da6265.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38dd8aad9cfb5e1fe2a45d80923f1571.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6949c16730daaf0a77f0257029bf64.png)
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8 . 在
中,角A,B,C的对边分别为a,b,c,若
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65397f11ea8af736f38debadf420c4a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03837b3769eda7f0d3804cc5ad4a6d60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a2264c134952d41fb9bcb90e6c72c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4e9bb42376c12d7d21702ae8062b25a.png)
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2020-09-18更新
|
423次组卷
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5卷引用:专题1.3+正弦定理、余弦定理的应用(2)(基础练)-2020-2021学年高二数学十分钟同步课堂专练(苏教版必修5)
(已下线)专题1.3+正弦定理、余弦定理的应用(2)(基础练)-2020-2021学年高二数学十分钟同步课堂专练(苏教版必修5)(已下线)专题1.4+解三角形单元测试(重点卷)-2020-2021学年高二数学十分钟同步课堂专练(苏教版必修5)江西省宜春市重点高中2019-2020学年高二下学期期末(文科)数学试题宁夏大学附属中学2021届高三上学期期中考试文科数学试题江西省新余市第一中学2020-2021学年高二年级第六次考试数学(文)试题
20-21高一·全国·课后作业
解题方法
9 . 若
,则
的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83e182b933202e6c7f283682b8741f10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d15b006dd591aa4e7a88caf9bd05306e.png)
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2020高三·全国·专题练习
10 . 已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7186539119a1489f731a8af2f79181d4.png)
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8647b84bfbc7d827f56be74888b9fdb6.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7186539119a1489f731a8af2f79181d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d37c35a8ae5caef9c99712e789cd3c10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8647b84bfbc7d827f56be74888b9fdb6.png)
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