已知
,
,向量
和
的夹角为
,则
等于( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617611a9739ec8beeeeb5b3723654e2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/553f9d4151c4b71b3ea207c3e2fe0a14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a92e6eba8dab638fd66831cd3a0b6d7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/427fa45527d0ce469bfd060bf6f991f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb6753f494dbcbc843644eaaac6c17d4.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
20-21高一下·全国·课后作业 查看更多[4]
(已下线)6.2.4 向量的数量积(练习)-2020-2021学年下学期高一数学同步精品课堂(新教材人教版必修第二册)宁夏平罗中学2022-2023学年高二上学期第一次月考数学(理)试题(已下线)专题04 向量的数量积(2)-《重难点题型·高分突破》(已下线)6.2.4 向量的数量积(导学案) -【上好课】
更新时间:2022-09-28 21:08:44
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【推荐1】若
,
是夹角为
的两个单位向量,则
与
的夹角为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05b28baf17059c56ee9ad1ae4814acd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b04618e5b2db68f2de6ba68972c505c.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b08ff4d206c38619a8a2378c71c1e16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f958e01d60a65e9eb1196051c268632.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】
中,
,
,
,且
,则边
的长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e899c486dc49e560fc4aca05e16835b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e32513c66bca1e2d1706d50a6615df1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79a691e536cf7ab7394b7cb70b66409a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcc2f5f6d9efe3852a2329ea927abcf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
A.2 | B.3 | C.4 | D.6 |
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【推荐1】已知向量
,
,且
与
的夹角为
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b821a889623ac467c40df8af7bb7305f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ebc9146f42563cf7b4c8598c60c73bcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/76dde16b05fba6fc61779511e63f34fe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6d343208f0f5e3aab71004c245dabe.png)
A.![]() | B.2 | C.![]() | D.14 |
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【推荐2】若向量
、
满足:
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7958a6bddd1d578bbd6fbcb92e3f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/152825ba039633dd16991c32a263de2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ae136d47d6da8d6f652f2a64f393b8.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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