名校
1 . 已知向量
,
,则
与
的夹角为( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f29860b1d60f2adaf4345f7e76aec17.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b8bdc00665b64169cc85647a7d9c37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cb80eb942aafb194fadc473776f35b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/433b94c39737727e53468df419d8314a.png)
A.0° | B.45° | C.90° | D.180° |
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2 . 设向量
,向量
,且a∥b,则锐角
的值为____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d61b375a4957e3239dccd97fff5562.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7f81536198acfb152b3cee090d02267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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3 . 已知向量
,
,
,其中
为
的内角.
(Ⅰ)求角
的大小;
(Ⅱ)若
,且
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c31c9bca77364417734805cac5eab6fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9810b72d1cd43b8028d40314aacd9093.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c77f8b267ae521810ce4bddb6e745d22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24e0c10fb103930eabd5fa18e8f9bb06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
(Ⅰ)求角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3224f36a581d2ac674cd4fdf422b5f2f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e675a92cad72c65aa4071b9d9e226090.png)
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13-14高三上·宁夏银川·阶段练习
4 . 设向量
,若
,则
=__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/63d650a2bcfdaa01f63a5bdab91f75e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7dced91de1b8c38aa95ffee0e5dc202.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/511366b3d52171408900f2f77bfeb372.png)
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5 . 已知A、B、C的坐标分别为
.
(1)若
,且|
|=|
|,求角
的大小;
(2)若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f70fadc5a8aa431d5c0e12b55b0665b.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e0eb536be02a36f6662f53089f23f8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d792a2aa25763e14cc2863be3887000.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be64d59ac6538a0f4d79fb825e082081.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab794de1fd4eb4135d60401b14a94bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/50510371c9373d4daa564d2b966bb948.png)
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2017-06-23更新
|
233次组卷
|
2卷引用:江苏省南京市金陵中学2015-2016学年高二下学期周末作业(2)数学试题
10-11高二下·江苏南京·单元测试
6 . 如图在长方形ABCD中,已知AB=4,BC=2,M,N,P为长方形边上的中点,Q是边CD上的点,且CQ=3DQ,求
•
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f79337e1928f2d71bb6a740824286f6e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3ee2a43a5313b9ade5f0570ecf8a770.png)
![](https://img.xkw.com/dksih/QBM/2011/7/7/1570252035555328/1570252040749056/STEM/a08afac8ef6549efa5a739e42469de86.png?resizew=185)
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7 . 在
中,已知
,
,若
分别是
的三等分点,其中
靠近点
,记
,
,
,则( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8520a21b909d04f763d0f61dd74bc158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f86c589939053ce21ce0a67cf40054a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91e1e4115d78e625e9e0f47cdade3286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aad3066aadbe41d8fb72bceed2e9d297.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f24ef72400d1eba4842046b6ba246b6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd4cb2e90e56e2563a28cb109261062f.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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8 . 等腰直角△ABC中,∠A=90º,AB=
,AD是BC边上的高,P为AD的中点,点MN分别为AB边和AC边上的点,且MN关于直线AD对称,当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4697499d5a967ff56473517cf98ae604.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2edbf20ab1edf01d4aa8211c3d09eb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4697499d5a967ff56473517cf98ae604.png)
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解题方法
9 . 已知向量![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d45c2d83670e3e8502f539476484b1d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c94075193c11fe43f2396cff5a485054.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33cd71da4a1ac3574bff54a77408a4cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a2f4b1178f68bd147d1a2a6acd04435.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1633988fd62a652de726ee92a917b52d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7b696f76f21e31fb51b36d6e2f9f9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
A.![]() | B.![]() | C.![]() | D.6 |
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名校
10 . 已知在
中,点
在线段
上,且
,延长
到
使
.设
,
.
、
表示向量
、
;
(2)若向量
,
,
、
夹角为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2b83beedb3438153e6f728545fe3e03.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e0c3b902ae24074cd49ffe4c6f5590c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e68c1d3694923f6043834f436049edd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d8eb792421232db18dc02415163ffe30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/420ad6159fc091d6a5ffddf0676d2662.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68c2e7e9fd8519fd1c293cc577408263.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/ef8337706c550bc095d7a2bd872221a1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c085dbb9d78aef7d81c3f4d6855f067b.png)
(2)若向量
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/994f5f1b332ac502f8da36d0a2edb83c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c7d3b256fec1c30b6dd2a7b8e202f7.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/037fb348109dc2063a268b10eb925a57.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eab08e7f6ab75a28125b96cdb45fea4e.png)
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