1 . 已知
与
的夹角为1200,且|
|=2,|
|=3.
(1)求
•
和|3
+2
|;
(2)当x为何值时,x
﹣
与
+3
垂直?
(3)求
与3
的夹角.
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/2bdeedb58f6d465ebefd280f15986197.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/6b6785944eb84da4b900e8177ed7fd7c.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/2bdeedb58f6d465ebefd280f15986197.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/6b6785944eb84da4b900e8177ed7fd7c.png)
(1)求
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/5ca8cc0eaa7f4ea1bb0439df27fc4232.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/265074fcfceb44afa6da992eadc47a50.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/5ca8cc0eaa7f4ea1bb0439df27fc4232.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/265074fcfceb44afa6da992eadc47a50.png)
(2)当x为何值时,x
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/5ca8cc0eaa7f4ea1bb0439df27fc4232.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/265074fcfceb44afa6da992eadc47a50.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/5ca8cc0eaa7f4ea1bb0439df27fc4232.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/265074fcfceb44afa6da992eadc47a50.png)
(3)求
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/5ca8cc0eaa7f4ea1bb0439df27fc4232.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629476864/STEM/815feee7498a46a0954dfb9429421ca4.png)
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2 .
的值为_____ .
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029753102336/1573029758394368/STEM/81b9bb2b7d5343d5b3706251e7f576dc.png?resizew=148)
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3 . 函数y=Asin(ωx+φ)(A>0,ω>0,|φ|<
)的部分图象如图,则其解析式为__________________ .
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629313024/STEM/ce4072c29d31413bb0541cd1d079edfa.png?resizew=21)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629313024/STEM/fd1e0c2298b840b8a358e248dab5b700.png?resizew=195)
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4 . 已知函数y=
cos2x+
sinxcosx+1,x∈R.
(1)当函数y取得最大值时,求自变量x的集合;
(2)该函数的图象可由y=sinx(x∈R)的图象经过怎样的平移和伸缩变换得到?
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029753102336/1573029758410752/STEM/df42c07b1ed0488d990cbc23043b02d0.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029753102336/1573029758410752/STEM/9d251de606ee4019a8d25d26580b821c.png)
(1)当函数y取得最大值时,求自变量x的集合;
(2)该函数的图象可由y=sinx(x∈R)的图象经过怎样的平移和伸缩变换得到?
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5 . 扇形AOB的半径为2,圆心角∠AOB=120°,点D是
的中点,点C在线段OA上,且OC=
,则
•
的值为
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629272064/STEM/4ba27703215b494dab8ea1a1b6f65e46.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629272064/STEM/1abfd71f9323412397f2d6cd6a04e77d.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629272064/STEM/338cd9aa23d54bb2872e0201e4ebd268.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629272064/STEM/1aad08dce7f544fc88856f2cf0ebbe1b.png)
A.2﹣![]() | B.2![]() | C.2+![]() | D.2![]() |
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9-10高一下·山西·阶段练习
6 . 已知θ是第二象限的角,则必有
A.tan![]() ![]() | B.tan![]() ![]() | C.sin![]() ![]() | D.sin![]() ![]() |
您最近一年使用:0次
7 . 已知向量
=(2cosθ,2sinθ),
=(3,
),且
与
共线,θ∈[0,2π),则θ=
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629231104/STEM/7e76b3d0282f47f39dc75992b24c1839.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629231104/STEM/637916ae7e7043c5ba2703ac405bc312.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629231104/STEM/30d5c967d6c4445bb98d6b1fb8e8d848.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629231104/STEM/7e76b3d0282f47f39dc75992b24c1839.png)
![](https://img.xkw.com/dksih/QBM/2016/9/18/1573029623242752/1573029629231104/STEM/637916ae7e7043c5ba2703ac405bc312.png)
A.![]() | B.![]() | C.![]() ![]() | D.![]() ![]() |
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8 . 已知向量
,
,若
,则![](https://img.xkw.com/dksih/QBM/2016/12/10/1579113445326848/1579113445457920/STEM/12b17784765f41c29b355f9e9e1e478d.png)
![](https://img.xkw.com/dksih/QBM/2016/12/10/1579113445326848/1579113445457920/STEM/7880fa746dfe4cc2804866928c751df6.png)
![](https://img.xkw.com/dksih/QBM/2016/12/10/1579113445326848/1579113445457920/STEM/3b9028cbc50e492bb0207a9a9025b4be.png)
![](https://img.xkw.com/dksih/QBM/2016/12/10/1579113445326848/1579113445457920/STEM/a4342a0f487e4907b49496711c77d6e5.png)
![](https://img.xkw.com/dksih/QBM/2016/12/10/1579113445326848/1579113445457920/STEM/12b17784765f41c29b355f9e9e1e478d.png)
A.![]() | B.4 |
C.![]() | D.![]() |
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9 . 已知函数
(
,
,
),其导函数
的部分图象如图所示,则函数
的解析式为
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619406895251456/1619406895546368/STEM/6934854bf70d4952a5835f158f7cca14.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619406895251456/1619406895546368/STEM/abd22cb6210a49139e3a970013b6d9b5.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619406895251456/1619406895546368/STEM/186f2185b7bf4b469399c7896da40b36.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619406895251456/1619406895546368/STEM/d7f722af862e4d28aa763be307fe1d1f.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619406895251456/1619406895546368/STEM/23dd7016702f42d7b8db7bbdeb0088e0.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619406895251456/1619406895546368/STEM/55e54d63a5884e2d9cd1e0aa390b8322.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619406895251456/1619406895546368/STEM/a5fd059bb5a2415b85dffa27758b6530.png)
![](https://img.xkw.com/dksih/QBM/2016/12/26/1619406895251456/1619406895546368/STEM/6934854bf70d4952a5835f158f7cca14.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
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10 . 已知函数
,其导函数
的部分图象如图所示,则函数
的解析式为
![](https://img.xkw.com/dksih/QBM/2016/12/9/1579113279234048/1579113279496192/STEM/1ec175f104784899874e64a0f66a4715.png)
![](https://img.xkw.com/dksih/QBM/2016/12/9/1579113279234048/1579113279496192/STEM/4c2bc9e4db694c55936c0d4a50a5448b.png)
![](https://img.xkw.com/dksih/QBM/2016/12/9/1579113279234048/1579113279496192/STEM/9ddff24690c64927a5b576f8a12b2c84.png)
![](https://img.xkw.com/dksih/QBM/2016/12/9/1579113279234048/1579113279496192/STEM/bee520f3f9d94a13a45b1e352693fe59.png)
![](https://img.xkw.com/dksih/QBM/2016/12/9/1579113279234048/1579113279496192/STEM/1ec175f104784899874e64a0f66a4715.png)
A.![]() |
B.![]() |
C.![]() |
D.![]() |
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