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1 . 下列各式中,值为1的是( )
A.![]() | B.![]() |
C.![]() | D.![]() |
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2024-02-23更新
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503次组卷
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2卷引用:福建省南平市2023-2024学年高一上学期期末质量检测数学试题
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解题方法
2 . 已知
,且
为钝角,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82ae70a9e5e2dd07cb5110d002754f1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/426338e92f6182e804d20216cf08e0aa.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2024-02-21更新
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1334次组卷
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5卷引用:广东省广州市华南师范大学附属中学2024届高三上学期数学周测试题(12)
广东省广州市华南师范大学附属中学2024届高三上学期数学周测试题(12)(已下线)专题10.1两角和与差的三角函数-重难点突破及混淆易错规避(苏教版2019必修第二册)(已下线)8.2.1 两角和与差的余弦-【帮课堂】(人教B版2019必修第三册)广东省佛山市高明区第一中学2023-2024学年高一下学期第一次大考数学试卷(已下线)专题02 三角恒等变换(1)-期末考点大串讲(苏教版(2019))
3 . 已知
,且
,求下列各式的值:
(1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25f8783429be686df75afcd56e847dfa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61ec5023778a6d4f9bc03c01566d22a6.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/520d0b8dfaa982a8884423e0ac7d435a.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eca410767a6f0540523912606b83d31.png)
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4 . 已知角
的终边经过点
.
(1)求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7682491936143816b3864fd26ae14818.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6369cd1db768436809404b1f3c4132c0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/147f48c14c4d8e6c08d05f4e90dc4bb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dd550060c16c5474f751af3e078652e.png)
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解题方法
5 . (1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f789027ef00d99097ee55d2285a53a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ca6fa9955690cec01db601e3abce0c.png)
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f789027ef00d99097ee55d2285a53a78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32ca6fa9955690cec01db601e3abce0c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33511b01d9202e3c7b6ee2fe868dd223.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f19975d8734bcd043c74ff51886d88b.png)
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6 . 已知
,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6eec7d75a66a4407631f75320bb8b15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50016272e94b3edd6a7b69a9ab45247c.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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解题方法
7 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aabf9fb99343704daad3c4ee473b8433.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fce6eb40ee34618946c04434997f76d5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
8 . 已知![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ac1449bb0d68998f1209a20c38353e.png)
(1)若角
是第三象限角,且
,求
的值;
(2)若
为锐角,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8ac1449bb0d68998f1209a20c38353e.png)
(1)若角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/608515b00a710bb8babcae8dbf730ad4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd288d4152caf5fc8187a1a901c8949f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebf290caa3f2eb3f2bf68d3e609c6693.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd288d4152caf5fc8187a1a901c8949f.png)
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解题方法
9 . 已知
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b625adb90839bb6bbd5ee2eee5702bc7.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/665dbee1e961c82bba2218b2c1f07f90.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b625adb90839bb6bbd5ee2eee5702bc7.png)
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解题方法
10 . 已知
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b892381d765dd7c2eed894b9f91a238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e304cf018473bb54edb166fcd6502b.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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