2020高三·浙江·专题练习
1 . 已知单位向量
,平面向量
、
满足
,
,
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd3cc805723d3ecc95b4472d13bb1bb6.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/045bc6a74878300bb26098343d7c4641.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5555d6634f8e0fe22b012ae8d419e0f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/026015d4806054775ce5b31d8cf0f661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b023a599ea979d946808f4d1e7b15f5.png)
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2 . 已知
,则
的值为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22d3eef07927bf243f8ed9f0b70b9a8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f7883cf110ba8d75ef6a2424260f86c.png)
A.1 | B.0 | C.5 | D.8 |
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3 . 已知向量
,
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e44dee27183afbb993519be165858ae.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0589aed4ef4a53ee4755a57a0d2f8d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4bb58883caf5c8ca1e94389839d294b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85527d190d4e1d6bac4145d1c716e65e.png)
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名校
4 . 在
中,角
所对的边分别为
,已知:
,
且
,求角![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26308ea6d8f321d27acbd7f9b131f9f1.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76f0649064a085fb74c997fb507a9b6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/009ea21d4742f2130ea66a95a35e3cd2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0af96af6dee490f7a7a47a95e50f0cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d45632b3ca6ab6c0b05df0d5a838c375.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26308ea6d8f321d27acbd7f9b131f9f1.png)
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5 . 已知向量
与
的夹角为
,且
,
.
(1)计算:
;
(2)若
,求
的值.
![](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/231b861d6d1f1d0b9f52b041cb40eb62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf0b40ab957abd03f1db03ddf71242fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459b84065e210c3ba8181a0c23255b79.png)
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99b4442b5d27518f76cb9b487650035c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d9c5e5972ea47681866dc17b1c101be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
您最近一年使用:0次
2019-12-06更新
|
426次组卷
|
2卷引用:上海市杨思中学2018-2019学年高二上学期期中数学试题
6 . 已知非零向量
与
的夹角为
,
,
,则
( )
![](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/a2331c755ff3034217ea3d9f45b25f62.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c17141859be0203b143d4eaf21c8f7f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9d6e98ffe17643191a4f02afe86b2c2.png)
A.![]() | B.3 | C.![]() | D.![]() |
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7 .
是边长为
的等边三角形,已知向量
、
满足
,
,则下列结论正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a7d688a2aaaa1e9f22e4a901f1b45e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e2e7365cc737093d7aa4d4a0ec5a667.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2019-12-01更新
|
308次组卷
|
2卷引用:辽宁省六校协作体2019-2020学年高三上学期期中数学(文)试题
8 . 设
与
是相互垂直的两个向量,
,
且满足
,则
( )
![](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/bf0b40ab957abd03f1db03ddf71242fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/285a78e061d318c724971ce7def2d8dc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af7e5e4ccbacc0ea7bca5768f6b250bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5085e3cdef9ea6c564e079f745d6fdb.png)
A.![]() | B.4 |
C.2 | D.![]() |
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2019-11-29更新
|
501次组卷
|
2卷引用:重庆市重庆市渝中区巴蜀中学2019-2020学年高考适应性月考卷(三)数学(文)试题
9 . 设
、
、
是任意的非零平面向量,且相互不平行,关于以下命题:①若
,则
;②
;③
不与
垂直;④若
,则
与
垂直.其中真命题的个数有( )
![](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/eb2573e682e7f1dfe161594793035f69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f9eb367907f6b91016ce8abce5d8f73.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8c308ea87b699ee1dcb879a568899de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/452ea5747aa9c4ecb8d9e21c3bda14b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/969604545902c9a66549a4a44ec3a3c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90ab17fd4247cdd710c363d5d3fbc5bd.png)
A.1个 | B.2个 | C.3个 | D.4个 |
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10 . 设向量
、
满足
,
,
.
(1)求
的值;
(2)若
,求实数
的值.
![](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/bf0b40ab957abd03f1db03ddf71242fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459b84065e210c3ba8181a0c23255b79.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efa14d6a2db0ae40b728e142a7bccb22.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a560b8ff794c12dc8d194bcd2e3f3554.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4d9c5e5972ea47681866dc17b1c101be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f0a532e15e232cb4b99a8d4d07c89575.png)
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