解题方法
1 . 如图,在平面直角坐标系xOy中,两锐角
,
的始边都为x轴非负半轴,终边分别与单位圆O交于A,B两点,若点A的横坐标为
,点B的纵坐标为
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/dab31c05-9fa5-4a4b-8a19-887f588249c2.png?resizew=177)
(1)分别求
,
的值;
(2)求
的值.
![](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/8b96754743b4a2d1e7b55598af708344.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d83fb9ac8a18e78a4c56da79514b5ccb.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/30/dab31c05-9fa5-4a4b-8a19-887f588249c2.png?resizew=177)
(1)分别求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f35152720e43c6403d43bef47c0377d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbfea1e888676a13ad69c72fba0405ea.png)
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2 . 如图,角
以
为始边,它的终边与单位圆
相交于点
,且点
的横坐标为
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eac97e6740365c85ad857aff85cefbe5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51080a7a90cf4964c15e6316fbe658f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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3 . 在平面直角坐标系
中,锐角
的顶点在坐标原点
,始边与
轴非负半轴重合,终边与单位圆交于点
,且点
的纵坐标为
.
(1)求
和
;
(2)求
的值.
![](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/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7294f5ae2a24ff42e84cd9773b2a7287.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02fc27f36003850ea40fb1d9cf18d462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850dba25bf0f5f13541bf9b6ec12b84d.png)
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4 . 在平面直角坐标系
中,以
为始边作角
与
(
),它们的终边与单位圆分别相交于点
,已知点
.
![](https://img.xkw.com/dksih/QBM/2020/1/30/2388072192073728/2388181329297408/STEM/4d17f09b8f9f4170bf609986bdd41e8a.png?resizew=183)
(1)求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.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/cfa948cb66784cd5839721537ae85542.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6bce3d91ca23b86d8c6625f2632e437.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/689f597676379e965d777c58872e8e76.png)
![](https://img.xkw.com/dksih/QBM/2020/1/30/2388072192073728/2388181329297408/STEM/4d17f09b8f9f4170bf609986bdd41e8a.png?resizew=183)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/653e1e6f59a7a6ee662267f900851389.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2710b09aff9f5b66513afaacf7bb230.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63fe57d4fbae536de2e641d9d349fcf1.png)
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5 . 在平面直角坐标系xOy中,若角
的顶点在坐标原点,始边与x非负半轴重合,终边与单位圆交于点P(m,n),且
,
,则m=( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/52ba4c7019a33310efda9f77e6fa5d3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bf7bf3192755667df35fcbdf5324286.png)
A.-![]() | B.![]() | C.-![]() | D.![]() |
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6 . 如图所示,已知
轴上一点
按逆时针方向绕原点做匀速圆周运动,1秒钟时间转过
角
,经过2秒钟点
在第三象限,经过14秒钟,与最初位置重合,则角
的弧度数为
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/255cff5d-977e-4d19-a8bb-0e2a9316c98a.png?resizew=175)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c6ff81aedbefa935da289dc632e78eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99420afe3c2b10837ae37e5fb4b53d7a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd995178601c2ad7b40f973d268c7bb7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04582116cd765fcc5a52f44279ad6c94.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/255cff5d-977e-4d19-a8bb-0e2a9316c98a.png?resizew=175)
A.![]() | B.![]() | C.![]() ![]() | D.无法确定 |
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7 . 在平面直角坐标系
中,设锐角
的始边与
轴的非负半轴重合,终边与单位圆交于点
,将射线
绕坐标原点
按逆时针方向旋转
后与单位圆交于点
,过
作
轴的垂线交
轴于
.
(1) 求
,
;
(2)求
的面积
.
![](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/df32f497ef2b36c0d19a98e0cf2971a7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abd13974aebe38eb2a1d744a01ea5aa5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.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/ac047e91852b91af639feec23a9598b2.png)
(1) 求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b4179e1ab8705cf19ea7aaf48888843.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4aef681e03396ab434adb3d28bd26150.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ccccba8f0b07e4f9844bf21d6459eedb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
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2卷引用:北京市平谷区2019-2020学年高一上学期期末数学试题
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8 . 如图,在平面直角坐标系
中,以
轴为始边作两个锐角
、
,它们的终边分别与单位圆相交于
、
两点,已知
、
的横坐标分别为
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/fdbba2a4-56ca-42e0-8c70-ad9accf808da.png?resizew=172)
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3e5af20b2f8c1fba4470f9650989e51.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/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9868f77d5ab5073b6145f1c6d272122e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd92f594c348f7a956607f7b381cc22a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/3/fdbba2a4-56ca-42e0-8c70-ad9accf808da.png?resizew=172)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/850dba25bf0f5f13541bf9b6ec12b84d.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6802fa592c03ef7c4a8c03f3e8932f8f.png)
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9 . 已知角
的顶点在坐标原点,始边与
轴正半轴重合,若角
的终边交单位圆于点
,且
,求出点
的坐标以及
的值.
![](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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f8ada14990e0c917b68e249e8b2386d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e609ecb22257c1ca2fe78b1dc2e62141.png)
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10 . 设A、B是单位圆O上的点,C是圆与x轴正半轴的交点,
为正三角形,AB//x轴,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/63f858ac-d966-43ec-8acc-4c2d52da42bd.png?resizew=157)
(1)求
的三个三角函数值;
(2)设
,求
的值..
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9fd2981bf2261343f905ec1b5355a3c4.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/5/63f858ac-d966-43ec-8acc-4c2d52da42bd.png?resizew=157)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e1e2a60c37ebc303d4fc2bf3d6a234.png)
(2)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/813b1b0327154103afd7a728f00cfeda.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6773195ac735290816792f5da5441990.png)
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