已知向量
,
的夹角为
,
,
,
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
______ ,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c24095e409b025db711f14be783a406c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70e310702748855c3edccd151aae0143.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed7444ed9ccdd2dc5ac13be29f40fc68.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb9ee73e05c2ea6a4b937b7ff42ac925.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/55ef2b20e067d1865108bdb4ac7c1095.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b657cfa91b6394e4b00fa385a2c0149.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
更新时间:2024-05-11 01:29:02
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【推荐1】笛卡尔坐标系是直角坐标系与斜角坐标系的统称,如图,在平面斜角坐标系
中,两坐标轴的正半轴的夹角为
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【推荐2】若向量
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您最近一年使用:0次
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【推荐1】若
,
是空间两个非零向量,则
(1)当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22afe46ba5fb966b714bf2263af67368.png)
______ ;
(2)当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22afe46ba5fb966b714bf2263af67368.png)
______ ;
(3)当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22afe46ba5fb966b714bf2263af67368.png)
______ .
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(1)当
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(2)当
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(3)当
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您最近一年使用:0次
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(0.85)
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解题方法
【推荐2】已知
,
,
,则
与
的夹角的度数为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f18996bd00253c3ad9f91780103affb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b72494c40e9c7afffd5238fd53e2e3b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
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解题方法
【推荐2】已知平面向量
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