解题方法
1 . 已知
,
,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3d15b377e37c9e0fcbfce046148bdb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f201f6e84279e80b85f394f4d930ed41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9146fc0a63e5c14a8fa46573e60c07ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
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解题方法
2 . (1)已知
,
在第四象限,求
,
的值;
(2)已知
,
在第二象限,求
,
的值;
(3)已知
,求
,
的值;
(4)已知
,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d26c247e674b8449ea78b62c18ff8d54.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8dcef576b08f00c2058497b14fc0277e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8243953e45f9db416d64b444b259b02b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
(4)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e4c7b94f2f548b7b705ccc52ebc060c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a48345d239aaf8e9ca1ff2846c08a99.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c5a05a11f731194a845e68a0479ce4.png)
您最近一年使用:0次
解题方法
3 . 已知
,
,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d793dc190f23c3692a1a769ef58b584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/75d28eab3b97cbeff2ff5527a0603ed1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c136aaf9b5dedec254a92ce302f4a70c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e3c905ee86ab199ec8cab8de05c864.png)
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2023-10-09更新
|
939次组卷
|
3卷引用:2.1 两角和与差的余弦公式及其应用
解题方法
4 . 已知
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d33658e09092e727b0035825036fc8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bfdb5f50c0514b2b7cb83b2c29407b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0184abed8ae5c68ddafff2b64faa6bbe.png)
您最近一年使用:0次
2023-10-09更新
|
660次组卷
|
5卷引用:2.1 两角和与差的余弦公式及其应用
(已下线)2.1 两角和与差的余弦公式及其应用北师大版(2019)必修第二册课本习题第四章§2两角和与差的三角函数公式(已下线)5.5.1两角差的余弦公式(第1课时)(分层作业)-【上好课】黑龙江省牡丹江市海林市朝鲜族中学2023-2024学年高一上学期第三次考试数学试题北师大版(2019)必修第二册课本例题2.1 两角和与差的余弦公式及其应用
5 . (多选)如果α是第二象限的角,下列各式不正确的是( )
A. ![]() |
B. ![]() |
C. ![]() |
D. ![]() |
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6 . 已知
,
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f71d0f8b4417ca9c4626facc030527dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/29bfdb5f50c0514b2b7cb83b2c29407b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
您最近一年使用:0次
解题方法
7 . 若
是第三象限角且
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b80751c98f9991b9cfc03923a98834.png)
________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/874eb9d4a07faa074a6fed787cc6c771.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00b80751c98f9991b9cfc03923a98834.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
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23-24高一上·江苏·课后作业
8 . 求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9fe7d59a653038cd210d87e9025f0ba.png)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9fe7d59a653038cd210d87e9025f0ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33f3ce0f574ccacc4cf6e9540ae89f67.png)
您最近一年使用:0次
2023-08-09更新
|
468次组卷
|
6卷引用:第4课时 课中 同角三角函数的基本关系(完成)
(已下线)第4课时 课中 同角三角函数的基本关系(完成)人教A版(2019)必修第一册课本例题5.2 三角函数的概念(已下线)5.2.2 同角三角函数的基本关系(导学案)-【上好课】(已下线)5.2.2 同角三角函数的基本关系(5大题型)精练-【题型分类归纳】(人教A版2019必修第一册)(已下线)5.2.2 同角三角函数的基本关系-同步精品课堂(人教A版2019必修第一册)(已下线)7.2.3同角三角函数的基本关系式-高一数学同步精品课堂(人教B版2019必修第三册)
23-24高一上·江苏·课后作业
9 . 同角三角函数基本关系的变形
(1)
__________ ;
__________ ;
(2)
__________ ;
__________ ;
(3)
__________ .
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7abfa042b15559d90fa920c515d06bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b828cc77fd52e1b23d0e9f5a595da4.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd2a174bca3ae32250cefc6f48a7f1dd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14755b42d69c7b816b29f1340964455e.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/59a31714d4f2090284c2005480e314cd.png)
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10 .
的化简结果是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/031d9f41143d68523207c0618e760146.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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