题目
题型：不详难度：来源：
| a |
| b |
| a |
| b |
| π |
| 3 |
| p |
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丨
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丨
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答案
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| a |
| b |
| a |
| b |
| π |
| 3 |
| 1 |
| 2 |
| a |
| b |
∴
| p |
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| 1 |
| 2 |
∴|
| p |
| 3 |
故答案为
| 3 |
核心考点
试题【已知a，b是非零向量，且a，b夹角为π3，则向量p=a丨a丨+b丨b丨的模为______．】；主要考察你对平面向量数量积的运算等知识点的理解。[详细]
举一反三
均为单位向量，且
=
，则，的夹角为（ ）| a |
| b |
| a |
| b |
| π |
| 3 |
| p |
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丨
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丨
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| a |
| b |
| a |
| b |
| π |
| 3 |
| 1 |
| 2 |
| a |
| b |
| p |
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| 1 |
| 2 |
| p |
| 3 |
| 3 |
均为单位向量，且=，则，的夹角为（ ）
+，1)(t＞0)
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