21-22高一·湖南·课后作业
解题方法
1 . 利用三角函数的定义求下列各角的正弦、余弦和正切值.
(1)
;
(2)
;
(3)
;
(4)
,
(5)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1ad72d7565699d1ebb741eb0ce12bac.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5ee87c2238af98e17416a22aca19ee5.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3b199d124fb9a5bc8438c9884f04534.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1975a3ec9c7de46ab5e1e4d081c91bf4.png)
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21-22高一·湖南·课后作业
解题方法
2 . 已知角
的终边经过点
,求
的正弦、余弦和正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0446e74cc690fdf926ba37032de8131d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
21-22高一·湖南·课后作业
解题方法
3 . 利用三角函数的定义,求下列各角的正弦、余弦和正切值:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e9fdc1f8ed0ae44b54a9a2a3aca2db4.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/953b78787e8b2454510bedbfa14b7167.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54fc6601f0dd2d9719047af13bf48dd.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0203d236c53db2cbcbe00b7ffe5fe57d.png)
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21-22高一·湖南·课后作业
解题方法
4 . 已知角
的终边上一点
的坐标为
(其中
),求角
的正弦、余弦和正切值.
![](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/1352154df867a300d9bf544d88105ad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fff6e7e2b9f2b68b1647f6350b98dc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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21-22高一·湖南·课后作业
5 . 已知角
的终边经过点
,其中
,求角
的正弦、余弦和正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/def27babb8ced1adf755d9ed12dfad8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20849c00c47cbdc43f18d53341b6c4e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
您最近一年使用:0次
21-22高一·全国·课后作业
6 . 填写下表.
角![]() | ![]() | ![]() | ![]() | ![]() | ![]() |
![]() | |||||
![]() | |||||
![]() | |||||
![]() |
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21-22高一·湖南·课后作业
解题方法
7 . 如图,在平面直角坐标系xOy中,锐角
和钝角
的终边分别与单位圆交于A,B两点,且A,B两点的纵坐标分别为
,
.
和
的值;
(2)求
的值;
(3)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/7294f5ae2a24ff42e84cd9773b2a7287.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5756451881af4d6594c820652ebcc2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3eacde1c42151734fdc60f3001b590de.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8114e78ac5798c981a09a8d282875f99.png)
(3)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a035e688c7cc5382435f05c4c5fa1b9.png)
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21-22高一·湖南·课后作业
解题方法
8 . 如图,在平面直角坐标系
中,圆O与x轴的正半轴交于点A,点
在圆O上,点C在弧AB上,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ee31829d0d4d5f779a957d7df8058ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7ea6b5f801158380a615c3f99f615e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b5f8bfb67901532101c44b6ffe342d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/316e85517919c422ecd81c95fb367d57.png)
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21-22高一·湖南·课后作业
解题方法
9 . 如图,在平面直角坐标系xOy中,角
的始边为Ox,终边与单位圆交于点P,角
的始边为OP,终边与单位圆交于点Q.试利用勾股定理推导出角
与角
的和与差的四个正弦与余弦公式.
![](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/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b5858ee1ce52b251816757257a11c29.png)
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20-21高一·全国·课后作业
10 . 用定义法、公式一求下列角的三个三角函数值(可用计算工具):
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0f5edd8ca1817e2d5a3648e9bb6b772.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0e146ac97b1f858ca22866d85562410.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8aec94ec11e26fac319c02c6b8800742.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/39bffa6d623447080e863fbd840258f9.png)
您最近一年使用:0次