名校
1 . 在平面直角坐标系中,设向量
,
,其中
.
(1)若
,求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/afb2a6ac6bb1cb11445577dd97e0fa30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2816da9d82ecc32624538abba8de6f63.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c65b6c42393fae47c51101713167ff71.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/069da5c624837df29947b7b8bf722097.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67ece25e67364e091ef92fe9600312ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b0fe4d834e8eaca89ceaf9c64cdabd9.png)
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2 . 已知
为锐角,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd6939572cdcc907703ece56c6d1c91.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/44fa8fc21e09121a1ab50fc7bc34a01f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bd6939572cdcc907703ece56c6d1c91.png)
您最近一年使用:0次
2019-10-09更新
|
474次组卷
|
4卷引用:人教A版 必杀技 第三章 三角恒等变换 3.1.3二倍角的正弦、余弦、正切公式
解题方法
3 . 在平面直角坐标系中,点
是角
终边上的一点,点
是角
终边上的一点,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/115a0c87ac14dbb770c95d74d6e26073.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a98ef6b26186130f8d88c66d3b3c78fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bbb006ea697b63a914eb487073f0abe1.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
4 . 如图所示,点P是单位圆上的一个动点,它从初始位置
开始沿单位圆按逆时针方向运动角
到达点
,然后继续沿单位圆逆时针方向运动
到达点
,若点
的横坐标为
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6423b1a7a22b2bed0ddcc5fc609f6df5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a5f031fbe09d8ed7d451279f31eb595.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2d88591679796c52024d11c4de641bdb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26bf9267a764abbf04228d006d4914e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/17/d472bbf4-cd2e-4c8b-a1f0-b4748165c5d8.png?resizew=177)
您最近一年使用:0次
2019-10-10更新
|
393次组卷
|
5卷引用:【全国百强校】北京101中学2018-2019学年下学期高一年级期中考试数学试卷
【全国百强校】北京101中学2018-2019学年下学期高一年级期中考试数学试卷人教A版 全能练习 必修4 第三章 第一节 3.1.1两角差的余弦公式(已下线)第18讲 三角恒等变换(练)-2022年高考数学一轮复习讲练测(课标全国版)福建省泉州市安溪一中、养正中学、惠安一中、泉州实验中学2023届高三适应性联考数学试题北京市第九中学2022-2023学年高一下学期期中考试数学试卷
5 . 已知
,
,
、
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ebb96c73c0abf240bdc3f9d1ecec7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b184f8323a8324a7d49599feb29a5598.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b9082ee8dab6c1e4e325c9db6b9f31.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53384df13c2f52b8fdc1461bd2a52d0e.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc4c63a548b91061528aa11058de75.png)
您最近一年使用:0次
名校
解题方法
6 . 已知
为锐角,
,
.则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a2b8dae45cd30a752aedb1ca66c30a.png)
_________ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1fb3a59161b58a1e6577faa9fe1fe31.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db73deb6fa502e49e3c873ef076fbc32.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/710be94194896bce781527e733acb362.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/06a2b8dae45cd30a752aedb1ca66c30a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1fb3a59161b58a1e6577faa9fe1fe31.png)
您最近一年使用:0次
7 . 已知
均为锐角,
,
,求角
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e288596fa3811dd2c17bded60e82e7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ee6b1670b2b446ace5bc12d7385b8e78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f036dbd538957cd9631bb162a53cf019.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
您最近一年使用:0次
2019-10-10更新
|
418次组卷
|
2卷引用:人教A版 全能练习 必修4 第三章 第一节 3.1.1两角差的余弦公式
解题方法
8 . 已知点
是角
终边上的一点,则
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a598f4cabe95a4a72eafe1b53f61cf80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa404481d8b9e19f2160632ef08283f7.png)
您最近一年使用:0次
2020-08-26更新
|
228次组卷
|
4卷引用:人教B版(2019) 必修第三册 过关斩将 第八章 向量的数量积与三角恒等变换 8.2.1 两角和与差的余弦
9 . 已知菱形
中,
,
是边
上一点,线段
交
与点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/e0d6a464-2f4c-4bbd-a061-f8beed97ff8f.png?resizew=176)
(1)若
的面积为
,
,求菱形的边长
.
(2)若
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6e0b64d25ddd18454f88e40c45d7d8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/28/e0d6a464-2f4c-4bbd-a061-f8beed97ff8f.png?resizew=176)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd3b58d32346a8d31bc90adc67d37b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/860884c0017c8bceb5b0edff796c144f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/490f0c21a0bfecc1447d54803af0b119.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cdee81051ac4b628a24b856ad7e1444e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5176d20d920d77ef961ee50cc83a8f8d.png)
您最近一年使用:0次
10 . 在平面直角坐标系
中,将点
绕原点
逆时针旋转
到点
,若直线
的倾斜角为
,则
的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c179fe7eff7abfdd092b63c9c1b82d0c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af9955b5aebb73cd84447e8541f901ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
您最近一年使用:0次
2020-02-03更新
|
282次组卷
|
4卷引用:2016届上海市奉贤区高三4月调研测试(二模)(文)数学试题