名校
解题方法
1 . 正弦波是频率成分非常单一的信号,其波形是数学上的正弦曲线,任何复杂信号,如光谱信号,声音信号等,都可由多个不同的正弦波复合而成,现已知某复合信号由三个振幅、频率相同的正弦波
,
,
叠加而成,即
,设
,
,
,
,若图中所示为
的部分图象,则下列描述正确的是( )
A.![]() |
B.![]() ![]() |
C.若![]() ![]() ![]() |
D.若![]() ![]() |
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解题方法
2 . 若
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e338982ac22f4f41216921c7bb7e1a29.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd223222a4a53ae2a67e6e42b8712951.png)
A.![]() | B.7 | C.![]() | D.![]() |
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2024-03-30更新
|
939次组卷
|
2卷引用:江西省2024届高三下学期二轮复习阶段性检测数学试题
名校
解题方法
3 . 已知四边形
中,
,
,设
与
面积分别为
,
.则
的最大值为__ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce519312a849963b376c202c3f9d7cf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/93fb5a916bc3f6945a490356aa3b5582.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab2a2834d80ff574e79eae8ca8d4e94f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/661ff55b5ebbadfb600989af3cfce2fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e097c8d4c948de063796bd19f85b3a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e0bd63f55069a3bc870915010b39225.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be89b91f05f281190209b1e876299d57.png)
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4 . 已知函数
.
(1)求
的最大值及取得最大值时x的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/262e5d8674ede1407421faccdd246a09.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d275fbb3ee5cd1177ca5a2ceecbbef0f.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6084e5585a6d33db894dd510f777870d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c807d9de6560fe0a6ccaf87f47110cf.png)
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2024-03-28更新
|
646次组卷
|
2卷引用:江苏省苏州园二2023-2024学年高一下学期3月月考数学试题
解题方法
5 . 已知
为第二象限角,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c4e9eef596fbcf735ed9b557a453fbfd.png)
A.![]() | B.0 | C.1 | D.2 |
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名校
解题方法
6 . 对于一组向量
,
,
,…,
,(
且
),令
,如果存在
,使得
,那么称
是该向量组的“长向量”.
(1)设
,
且
,若
是向量组
,
,
的“长向量”,求实数x的取值范围;
(2)若
,
且
,向量组
,
,
,…,
是否存在“长向量”?给出你的结论并说明理由;
(3)已知
,
,
均是向量组
,
,
的“长向量”,其中
,
.设在平面直角坐标系中有一点列
,
,
,…,
满足,
为坐标原点,
为
的位置向量的终点,且
与
关于点
对称,
与
(
且
)关于点
对称,求
的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d344174267f996c7cefecfd6985d380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e900404ba71110c5861ced9634646f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dbe2e19d8960789ec873b687998b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4a47bdc03f0ced8245c526c81593363.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4613271f782a90ab580131d09d03d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3bcfc48f9bc23cc43085bdb910e7a136.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92c1d22f02fa7f8f1ff1db3f322a9fc5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e955b4525bb55e72c131d829406df508.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c98c622975aaf93ed0c63be1294d2170.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f50ecfa147131019f969c3bc78169f7.png)
(1)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c33a899454f0d42377d4ea0324dd812.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4613271f782a90ab580131d09d03d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dbe2e19d8960789ec873b687998b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d344174267f996c7cefecfd6985d380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e900404ba71110c5861ced9634646f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dbe2e19d8960789ec873b687998b58.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/74da885934fa5f71f25b65d46346920c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd4613271f782a90ab580131d09d03d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de8610232c77741a37463feba1a66c94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d344174267f996c7cefecfd6985d380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e900404ba71110c5861ced9634646f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dbe2e19d8960789ec873b687998b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a164fd6439284f1ff4a9b1f02d609f7.png)
(3)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d344174267f996c7cefecfd6985d380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e900404ba71110c5861ced9634646f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dbe2e19d8960789ec873b687998b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5d344174267f996c7cefecfd6985d380.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2e900404ba71110c5861ced9634646f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67dbe2e19d8960789ec873b687998b58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9112bd58ae60d2516b67de408465ccd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca270240c9c1d115d3c60b58d1556c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf83e20035c3afd6d26ebfd53d768a70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82dc7540c4cdee4c34a9311c79b35d95.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc4dc226800792c55eaa32134041837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36f306a75051c9a11c92aa30a836a016.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2b5ea93b62e9b06f0060ab0d09e6633.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fc4dc226800792c55eaa32134041837.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e10f2f74e201f77f853e9ed9078615c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f0d68648b10fce54dfc19c5ee60086d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8e57169c0d88ae0b680636653f4c860.png)
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2024-03-26更新
|
764次组卷
|
6卷引用:上海市建平中学2023-2024学年高一下学期第一次教学质量检测(3月月考)数学试卷
上海市建平中学2023-2024学年高一下学期第一次教学质量检测(3月月考)数学试卷安徽省安庆市第一中学2023-2024学年高一下学期第一次阶段检测数学试题(已下线)模块三专题4大题分类练(专题3 平面向量数量积)【高一下人教B版】(已下线)模块四 专题4 重组综合练(安徽)(已下线)期末测试卷01-《期末真题分类汇编》(上海专用)(已下线)考题猜想03 平面向量-期末考点大串讲(沪教版2020必修二)
解题方法
7 . (1)已知
且
及
,求
的值;
(2)已知
,且
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be4ed902544ed34cc753e0f545f1553d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bc282dae4ac9132196ac5d13f63b901.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4a009ce821e3add1f56315dd54826307.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8dc4c63a548b91061528aa11058de75.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/536e072eb0439a5e5b430cd55a129374.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e2b73fab111d615d3042e5c9d63fed4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f9c1f914da4657eca7865982b130b299.png)
您最近一年使用:0次
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解题方法
8 . 已知
,且
,则
为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/83d9c0a8dcadf97d4d8b7ece48612e4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c13c3fd91562221018717e9a68c0af5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a16d92d3ccdf0ecfaa43eb8ed62ae5a4.png)
A.第一或二象限角 | B.第二或三象限角 | C.第一或三象限角 | D.第二或四象限角 |
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2024-03-25更新
|
601次组卷
|
7卷引用:四川省绵阳市三台中学校2024届高三下学期三诊模拟考试(第三学月月考)文科数学试题
四川省绵阳市三台中学校2024届高三下学期三诊模拟考试(第三学月月考)文科数学试题辽宁省葫芦岛市绥中县第一高级中学2023-2024学年高一下学期期初考试数学试题(已下线)高一 模块3 专题1 第4套 小题进阶提升练 【人教B版】(已下线)高一 模块3 专题1 第2套 小题进阶提升练 【人教B版】(已下线)高一 模块3 专题1 第4套 小题进阶提升练【北师大版】(已下线)高一 模块3 专题1 第2套 小题进阶提升练【北师大版】(已下线)【一题多变】倍角分角 位置可秒
名校
解题方法
9 . 已知
为第三象限角,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c50a0367a96faa9a98569102161ace3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5acb85cce3c0e8690fb31a0fd8b53a5.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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10 . (1)已知
,且
,求
的值;
(2)已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/277e9a75b7ec584398950db026cdd534.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3744ee15af01a8e7c0f126edb5f68132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab335ba2c9cdb9ddb773611d4b776d2e.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebd69840fea2f8db3c18fa22dcd9b5dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db589bebb2f413b51ab7d684f7eb990.png)
您最近一年使用:0次