21-22高一·湖南·课后作业
解题方法
1 . 已知
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c257ab5db8c406b30b59bed8416ae136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dcbe8b4bcd32e5a64ebfd873f8cbb2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4976754bd2fb3323a0966ea49f38cba6.png)
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21-22高一·湖南·课后作业
解题方法
2 . 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
3 . 若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1aee4c16fc2259269b3561af09cecd02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9146fc0a63e5c14a8fa46573e60c07ba.png)
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21-22高一·湖南·课后作业
解题方法
4 . 若
,
是第四象限角,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f8783429be686df75afcd56e847dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3881a5c39adcbb52af8f30c63e50716c.png)
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21-22高一·湖南·课后作业
5 . 由二倍角公式
可知,
可用
的二次多项式表示,从而推测
可用
的三次多项式表示,再结合
,试计算
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e12df1322bb7b3347de3e9feddb55ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c899048a6d36703452628fb11b7e689f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d66c03d4ca06819a6ce7fc8ea6de0f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0932b0388a5cef4ca3f16f8eb7c4207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/460dc20cc2eb8beb9eac71c5b00b4a7b.png)
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21-22高一·湖南·课后作业
6 . 已知函数
,求
的周期及单调递增区间.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/800538254dc4a49d439320592d64e962.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09f86f37ec8e15846bd731ab4fcdbacd.png)
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21-22高一·湖南·课后作业
解题方法
7 . 若
,
,求
,
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f8783429be686df75afcd56e847dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/12f102439ebd1efd422f04209ecec2bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9146fc0a63e5c14a8fa46573e60c07ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
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21-22高一·湖南·课后作业
解题方法
8 . 已知等腰三角形顶角的余弦值为
,求这个三角形底角的正弦、余弦以及正切值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/954795d1842974a705f9468f3b952ab1.png)
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2022-02-22更新
|
104次组卷
|
4卷引用:2.2 二倍角的三角函数
9 . 求下列各式的值:
(1)
;
(2)
;
(3)
;
(4)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3609b3903e5878d82e0ec958560f24b2.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f18bca9eefe5b97879e2b33f78f3be3d.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9caa4882539bf72022ace81abf0ab6c.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902d5740cea1d0b0fd3fea17c6e45e.png)
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21-22高一·湖南·课后作业
解题方法
10 . (1)已知
,求
的值;
(2)已知
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15b989b0a0088dbf7dd7019a7f214e3c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6f90c4754e6b6fc862d72943fb35569.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dc83553174c59b3eb7db409a58c871c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac18498031ad3033c6d8a4ca9fa9859c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad436744a7ad6a5e4be1bfde851f8ce8.png)
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