解题方法
1 .
中,若
,
,则角
的大小为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28b0a5504906a80fa67723b2c0b33faf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c9c67e2727f18443b5cf81ccca24892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2 . 已知向量
,
,若
与
垂直,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
_________
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36848a2bde03fcee46940e5d2de8487e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a42414eda778efd6d73bb3f1ea354860.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
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2020-07-04更新
|
298次组卷
|
3卷引用:安徽省合肥市第五中学2022届高三一模理科数学试题
3 . 已知向量
,
,函数
,函数f(x)在y轴上的截距为
,与y轴最近的最高点的坐标是
.
(1)求函数f(x)的解析式;
(2)将函数f(x)的图象向左平移φ(φ>0)个单位,再将图象上各点的纵坐标不变,横坐标伸长到原来的2倍,得到函数y=sinx的图象,求φ的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3129f99cd44867d29eac5edd018c32f9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2dddadb3dda01895cbda0fb706ad1ab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d130005526eb8df7039db16dbae4d0a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca9c6fe12d3a9727e00ef87a630302ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5b9395b89ec60b12edd2f1abc2f8c2a.png)
(1)求函数f(x)的解析式;
(2)将函数f(x)的图象向左平移φ(φ>0)个单位,再将图象上各点的纵坐标不变,横坐标伸长到原来的2倍,得到函数y=sinx的图象,求φ的最小值.
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2017-08-11更新
|
1277次组卷
|
2卷引用:2017届安徽省宣城市高三下学期第二次调研(模拟)考试数学(理)试卷
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解题方法
4 . 已知向量
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e62e4fda0429cab9db72b32109c0d9e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2224c25fbacbcf4bebb9f2d3c1b95b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef8f16f1ca4e00d69e74a30844744de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
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5 . 若
,
是夹角为
的两个单位向量,则
,
的夹角为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8315ec34019d719771152be2252106e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf39ca3294f5520518dd4f1c0609876.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fe93726b55ce919ab61705d43e5e207.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f5cba6e9d9245e2524c1e3ff4d2116.png)
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2020-02-14更新
|
348次组卷
|
3卷引用:安徽省合肥市一六八中学2019-2020学年高一上学期期末数学(诺贝尔班)试题
6 . 已知向量
,则
在
方向上的投影数量为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/410504e1b2f947eedbc2ef585adccc3f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
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7 . 已知
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/da62e6e2acaaabeec343282944f0e95f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f93b3d4871d6e550524e5c17313aad9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b85acc53854d34d8964a32fd13ccfdbf.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 已知向量
,
,若
,则向量
的夹角的余弦值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcff8511b9ebf3eb65ef7315ceaa834a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a1b14c20ef9ed5a840b6e7dd0af7a0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5eba110b61622e4abf467be8859b1ece.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd246148371f6f825f94e68480190f25.png)
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2019-08-17更新
|
486次组卷
|
2卷引用:安徽省阜阳市太和中学2021届高三下学期高考押题文科数学试题
9 . 下列各角中,与
终边相同的角是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb4310b058aec9a814678ad9d5abc120.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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2020-02-19更新
|
340次组卷
|
3卷引用:安徽省示范高中2019-2020学年高一上学期第二次联考数学试题
10 .
角用弧度制表示为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1e5fa72f2878b476bc57f0df12d6555.png)
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