1 . 若劣弧
所在圆
的半径为
,所对的圆心角为
,若扇形
的周长为
,则半径为________ ,扇形的面积为_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d65cecaf8a3dc2953f4109c75a981e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11bc05f41215f9894e11d1df0465751a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f785147690f83dcee0a0bc6c327e75a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e4819c39c281427826e1b3f7a4c2b720.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f253c7c746fc88739004f893015a893a.png)
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2020-02-19更新
|
274次组卷
|
4卷引用:浙江省湖州市2019-2020学年高一上学期期末数学试题
2 . 已知函数
,若
,则
的一个单调减区间是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63a0fb22303be8fc741e9b8f298e5815.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3df41099732e04537ef5a749ea0a9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fe7d5809da02c15a43a0e9a898b9086.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
3 . 为了得到函数
的图象,只要把函数
的图象( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8776a5fef586ceec85222005b88c25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eaa1a022e646f1911701a4adb825b91f.png)
A.向右平移![]() | B.向左平移![]() | C.向左平移![]() | D.向右平移![]() |
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4 . 下列函数中,最小正周期为
的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86ebba6ed1add0fe647c0226614b9290.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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解题方法
5 . 已知
,
,且
与
的夹角
为
.
(1)求
,
,
;
(2)证明:
与
垂直.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28280aaac77be24aa72379e49b6f01e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5fbcc0fa4b480c43e9a66273898c9a60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a560b8ff794c12dc8d194bcd2e3f3554.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/328f41294c3421fac0eccb30c0d6667e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3321a6c9b4af731ee336ad51fca76c7.png)
(2)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fd4ff655de43e2bfea4ed9ae34e36de0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
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解题方法
6 . 已知向量
,
,
.
(1)求
的坐标表示;
(2)若
与
的夹角为
,求
;
(3)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f5f0429f546c6c8e98257596bacf6a6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2e948cb5a776a2af896500cf766732d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ecf5a16d34a6ff6e9eeb38957b1b2fb.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c0827b8bc1dfa2a44c0c0779a9abe7d.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aefd06c239145a2b6ae87a955aa51414.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb348b98e449935ca21fc96c47c10e49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
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解题方法
7 . 关于平面向量
,
,
有下列三个命题:①若
,则
;②若
,
,
,则
;③非零向量
和
满足
,则
与
的夹角为
;④在
中,
,
,
,则
;其中真命题的序号为________ .(写出所有真命题的序号)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f26e5e4f403677580c64da73caae506.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efde213b99d2271cdde71de744879d47.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2886bebcf6093ca45865437617bcf7f2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9d7cb0ca8c2bc559230a7becd2ecb6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89879d3524590fe7d253b6e3086de649.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/65236592312fc7def2cfbed202a8f887.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69ce07aacb776328b95f21af13b826da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/614b003a9f14fed694128f681b2f1d91.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be6a6301878fed2a01413020b27310a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab839d8569171afab5ed55c22013aa72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019eb94a6a2b38308811470d860e1a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb75557d217f59ef1f33e8da1ac0d09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c867ab355ffcc404e1c687f76385b32f.png)
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解题方法
8 . 设向量
,
满足
,且
,则
与
的夹角______ ;则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5414e7fb79b4b755b2f2570761814cfc.png)
_________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/09225953caa840055397bc34d4f0726c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9746d9a4f4041403f97d82955083c43.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5414e7fb79b4b755b2f2570761814cfc.png)
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9 . (1)已知向量
,
满足
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da256af94a99f2862ee1663a57a92c1.png)
______ ;(2)如图,正三角形
边长为2,设
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e19b33422f47118f80d6e1668812ab1.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/28280aaac77be24aa72379e49b6f01e4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/891c8134394ed55aec47d3c9535b105f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1da256af94a99f2862ee1663a57a92c1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/801d64c8f17f46d156a202e992e96238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0de1c802fa33c64dd50ee777c93c28d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e19b33422f47118f80d6e1668812ab1.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/13/c4ffbb31-a0ec-45fc-9193-d2424a885a6f.png?resizew=166)
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10 . 与向量
方向相反的单位向量是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/40b31aebd84a09c58eda7b46872c553c.png)
A.![]() | B.![]() |
C.![]() | D.![]() ![]() |
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