1 . 已知向量
,
满足
,
.
(1)若向量
,
的夹角为
,求
的值;
(2)若
,求
的值;
(3)若
,求向量
,
的夹角.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce9883f16cdef5fb87fb9d6a9897d113.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db24e47304fec964e8cb9278280046bb.png)
(1)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac1a63ab608517bb10aa036783dfb51f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/854e16eb319ee454088f5b527cf6c4d5.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/466821bb75badcfa72f433d106eaf246.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/596a3ee5d8473fc6619ea7730e13325b.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b904789c43cb34d62bc40a4d8773735d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64c5562bd4d1b54424330cb6329cd79d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
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解题方法
2 . 在
中,有如下四个命题,其中正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.若![]() ![]() |
B.![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() |
D.若![]() ![]() ![]() |
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解题方法
3 . 如图在
中,
,
,设
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb95d089784702a0b6d459f18a4e1e72.png)
表示向量
.
(2)若
,
,
,求
.
(3)若
,
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/41a84ab6721f8f7f510b54ae9ba5ef81.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4464d66a6064905e521a946843ceff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e923e4cdcbea6a029f5ba188a59229d6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb95d089784702a0b6d459f18a4e1e72.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0531c57fe21c3c5ada307af8d49f3b0.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5a0c278812c4813f6391c7993574e2f1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b59ab6bf6111dda4a3d428454768b77.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f2a8d0c77c54fdf9aa97978f8e5dc0b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b7ab10c3b9021757e9a89ab47807484.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b47a08a25693bbfa01026573625ad15.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d09a88dc7dc9cd668a57138e1ec71ea2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e811dee23eb88d9f05fbdc9fbabf77b.png)
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解题方法
4 . 已知
,则下列说法正确的是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af060f42e65bde15907dbb87c1e6318a.png)
A.若![]() ![]() |
B.若![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() ![]() ![]() ![]() |
D.![]() ![]() |
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解题方法
5 . 设向量
,
,
满足
,且
,
,
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2764a78c32a07c0ee3ac8fbaa48b9ce7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b45ba716f03748c19b7ce2f99af536ab.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73a0b19e69be46452425916a0fcb49c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2c4d61e0230ae6683b9d031295f5008.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bf21fef3026cfe445a855c94cab5c84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7958a6bddd1d578bbd6fbcb92e3f6a3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2396cac4b185cf1f1a67dad9248481c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cbf801a3b68cbb55084bf6576fff589d.png)
A.1 | B.2 | C.3 | D.5 |
您最近一年使用:0次
解题方法
6 . 在
中,
,点
满足
,且
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac4486890c4ba79dc50593b864800a8e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b12dcfb8f3fc0ac45d50782c3f248672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7aaee7371c1e926fe02eddfde7ee33be.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/825116eb345f5505ebc8c1cdb8a1f131.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
名校
7 . 已知平面向量
,若
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ff6227ff51440f5add6ad7c6346a17b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/826aa248dda88634b7a0e76b57028687.png)
A.![]() | B.![]() |
C.![]() | D.向量![]() ![]() ![]() |
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8 . 已知向量
满足,
,且
在
上的投影向量为
.
(1)求
及
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b172cf8d898883d82e973f28c3c3a3e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5e4b7345de7e85dacc2a49841c323b3.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/4d605678fb91caa11a8ed9e776c7bb3a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/daef91a6dc58061db290e3264716e0c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c39d1d88189726ae99c309644fca3494.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/adcfe9a2c8996a9c2c58344cf953be56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df64046e91b047037f19e4032e3b6de3.png)
您最近一年使用:0次
9 . 关于平面向量,有下列四个命题,其中说法错误的是( )
A.点![]() ![]() ![]() ![]() |
B.若![]() ![]() ![]() ![]() ![]() ![]() |
C.若![]() ![]() ![]() |
D.若向量![]() ![]() ![]() ![]() ![]() |
您最近一年使用:0次