解题方法
1 . 在物理学中,把物体受到的力(总是指向平衡位置)正比于它离开平衡位置的距离的运动称为“简谐运动”.可以证明,在适当的直角坐标系下,简谐运动可以用函数
,
表示,其中
,
.如图,平面直角坐标系
中,以原点
为圆心,
为半径作圆,
为圆周上的一点,以
为始边,
为终边的角为
,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/3e9039f8-35a5-402f-9830-72f99ff12a1d.png?resizew=146)
(1)求点
的坐标;
(2)从
点出发,以恒定的角速度
转动,经过
秒转动到点
,动点
在
轴上的投影
作简谐运动,求点
的纵坐标
与时间
的函数关系式.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e4232d15d5b5a890b9dab9b6084bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4cbc7b067862a3d9c6789b392fc068.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13378be06b6b01bcad1d261ff14e87cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4456675a5dbe545462a22cef9aca8fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/27/3e9039f8-35a5-402f-9830-72f99ff12a1d.png?resizew=146)
(1)求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
(2)从
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/074c228ffc7b1e306f8410afe7bc4b5c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eeebe2d626de76ae34a1a42b62a1a3bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
您最近一年使用:0次
解题方法
2 . 已知角
的顶点与原点
重合,始边与
轴的正半轴重合,它的终边过点
.
(1)求
的值;
(2)若角
满足
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c111a7b669770a2cc28e403ade76169.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fa26d96d02b0ea596a0c3357ae27fa0.png)
(2)若角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/577fd4d79427834eecacba91aa1e7afa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eacde1c42151734fdc60f3001b590de.png)
您最近一年使用:0次
解题方法
3 . 1874年欧拉第一次提出将角置于圆内,以有向线段与半径的比值定义三角函数.如图,在单位圆中,定义角
的正弦为有向线段MP,角
的余弦为有向线段OM.若在单位圆内,角
和角
均以Ox轴为始边,两角的终边关于
轴对称,且对应正弦的值均为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c634aa65493615fbb40f1352a88c5aa3.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.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/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dac452fbb5ef6dd653e7fbbef639484.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c634aa65493615fbb40f1352a88c5aa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/26/7600a162-548b-4cd4-9103-c5d793ce5e82.png?resizew=136)
您最近一年使用:0次
解题方法
4 . 已知点
的坐标为
,将OA绕坐标原点顺时针旋转
至OB,则点
的横坐标为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fc5251103ec60999d440a7f33dfaf570.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
您最近一年使用:0次
解题方法
5 . 已知角
的终边经过点
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70d45c243d18b3c631dc5d7c950b7abe.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/56e8da3e18d6d9d3ccd5974f2c187e44.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70d45c243d18b3c631dc5d7c950b7abe.png)
您最近一年使用:0次
6 . 角
的终边与单位圆的交点坐标为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d6e3fb5cd636f1275e4670cce14f457.png)
您最近一年使用:0次
7 . 与单位圆的交点为
的所有角的集合为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53a948d2f7732d7f03e986c63712089b.png)
您最近一年使用:0次
名校
8 .
是它与单位圆的交点为
的______ 条件.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cfc316f251b316a8a62c60017289cc80.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7160d93f92089ef36f3dab809d3114b8.png)
您最近一年使用:0次
2023-01-06更新
|
155次组卷
|
3卷引用:沪教版(2020) 必修第二册 新课改一课一练 第6章 6.1.3.2 任意角的正弦、余弦、正切、余切(2)
沪教版(2020) 必修第二册 新课改一课一练 第6章 6.1.3.2 任意角的正弦、余弦、正切、余切(2)内蒙古自治区通辽市开鲁县第一中学2022-2023学年高一上学期期末数学试题(已下线)湖南省怀化市2022-2023学年高三上学期期末数学试题变式题11-16
解题方法
9 . 如图,在平面直角坐标系
中,角
的始边与
轴的非负半轴重合且与单位圆相交于A点,它的终边与单位圆相交于
轴上方一点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/26/960bd7b6-18a9-49d9-b839-02570946c5c7.png?resizew=141)
(1)若点
的横坐标为
,求
的值;
(2)若
为等边三角形,写出与角
终边相同的角
的集合.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/26/960bd7b6-18a9-49d9-b839-02570946c5c7.png?resizew=141)
(1)若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af6ddf31b7d9225a4239883af72d153b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6cc9750c313ee972124cb62c4a6fb7ea.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/866b81a8384cce4f24867baca2e6820c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
您最近一年使用:0次
解题方法
10 . 已知
为锐角,证明
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2788b9f792001e2dc1380e2a566566e0.png)
您最近一年使用:0次