已知
,
,
与
的夹角为
,设
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c11c2b579031bf0a5a2fbaa7cf1643b.png)
(1)若
,求
;
(2)若
,求向量
与
的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/25eb9c7e34f20658b691df4c2bd2d8ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f64fb3f9f911b812dc774fabc7d8e91d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e163480714acc9dae5005cac65d217d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c37564ec4e9e92485f1769e8ffaac31d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/260200d547998bcac50a4a491382e7f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a30b69797124f2e096baa0914696f68d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1c11c2b579031bf0a5a2fbaa7cf1643b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36a1b09c653185842513e24ebba60bb3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aeb9a94e392f6759b18abed89aacc5e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
更新时间:2023-02-28 23:26:33
|
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解答题-问答题
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较易
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解题方法
【推荐1】已知向量
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80d769ab21af5365d3c00dc617375ce4.png)
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(1)
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(2)
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(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
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您最近一年使用:0次
解答题-问答题
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(0.85)
名校
【推荐2】已知向量
.
(1)若
,求
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(2)若
,求
的值;
(3)若
与
夹角为锐角,求
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd6d560095d59e83207e8851e9da82bf.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/076559f08d17fb25e82886e791719e52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
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较易
(0.85)
解题方法
【推荐2】设
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f18996bd00253c3ad9f91780103affb.png)
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【推荐3】已知向量
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(1)求向量
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5463fb0b7d03747aa4d680620ca81be2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92b1305dff4fc89f3e8bc75fa7c258de.png)
(1)求向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed492f7b29166ba5c1f0023b05a439c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/384a33a75de170e49f55eb2b38cfa001.png)
您最近一年使用:0次