1 . 已知向量
,且![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7a1df960feef63dec4790d63f52279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982c2cd8fd33539bd313fe3ea373e6c0.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50a082abf21f9776a980982321dc61cb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4f7a1df960feef63dec4790d63f52279.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/638537c0a30676c73fea76c80e0f8bd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1b8a88a16125366536cb4ad658e0cf1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/982c2cd8fd33539bd313fe3ea373e6c0.png)
您最近一年使用:0次
解题方法
2 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa3d3ca8ae9c034b384ba8267808553.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06f5942c1daff0e596af84d8009eb92e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aaa3d3ca8ae9c034b384ba8267808553.png)
您最近一年使用:0次
解题方法
3 . 若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afa6281fcf7b255aa3cf7520495af3f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b620cb99183f6e2440d944fa3593e3ec.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7日内更新
|
414次组卷
|
2卷引用:河南省南阳地区2023-2024学年高一下学期期末适应性考试数学试题
解题方法
4 . 若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d30513f5f1f3448030a032d19bd39fe.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac91f2148da45a1dd1052ddd47fa99a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d30513f5f1f3448030a032d19bd39fe.png)
您最近一年使用:0次
解题方法
5 . 已知
是第二象限的角,且
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f04115c951ae86515f10059a62d40264.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850dba25bf0f5f13541bf9b6ec12b84d.png)
A.![]() | B.![]() | C.![]() | D.–3 |
您最近一年使用:0次
解题方法
6 . 设
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e976891142f43f8b63cbadf4a040fe.png)
___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d246a6f180e720e0f9761d7a757c0647.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15e976891142f43f8b63cbadf4a040fe.png)
您最近一年使用:0次
解题方法
7 . 《周易·系辞》曰:易有太极,是生两仪,两仪生四象,四象生八卦.如图1是八卦模型图,图2是根据八卦图抽象而得的正八边形
与其内部的圆
,其中
,圆
的直径
为
为正八边形的中心,
为正八边形边上的动点,则
的最小值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d17d4a6cf11cda87b3dfafaecdec683f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/244d659e96d3b1138df9938b9cc6286a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6d8eb37a4dd75318dcbd836395e575bd.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
8 . 利用二倍角公式,求下列各式的值:
(1)
;
(2)
;
(3)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27c3f1d44369562ae36818e452c4548a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c882f7a82d4c4f296ca3be20b0af8f25.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65c033da8218df223a69710aca0172e7.png)
您最近一年使用:0次
9 . (1)二倍角的正弦公式:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d1754f35b809186c2ea04d55fbc170.png)
__________ .
(2)二倍角的余弦公式:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4c8f57aab5c4630bfc00c2d9f355a0.png)
__________ ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
__________ ![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
__________ .
(3)二倍角的正切公式:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f53e99e6241a86e8a533d7ce04a10c.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3d1754f35b809186c2ea04d55fbc170.png)
(2)二倍角的余弦公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e4c8f57aab5c4630bfc00c2d9f355a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6706fe00b4e231e62d9ecbec567d526b.png)
(3)二倍角的正切公式:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7f53e99e6241a86e8a533d7ce04a10c.png)
您最近一年使用:0次
2024-07-17更新
|
55次组卷
|
2卷引用:【导学案】 6.2.5 二倍角公式 课前预习-沪教版(2020)必修第二册第6章 三角
10 . 已知
,
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ff9e9a3c167c23e38be45e270d524a72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7345b8da9e59d5ad71d37c9659851303.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fdf65bf78b37dff86adaf836c54bdb57.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次