题目
题型：不详难度：来源：
| a |
| a |
答案
| a |
∴|
| a |
| cos2x+sin2x |
故答案为1．
核心考点
试题【已知向量a=(cosx，sinx)，则|a|=______．】；主要考察你对平面向量模和夹角的坐标表示等知识点的理解。[详细]
举一反三
| a |
| b |
| a |
| b |
| OC |
| 5 |
| OC |
| a |
| b |
| a |
| b |
| m |
| a |
| m |
| b |
| m |
| m |
| A．2 | B．1 | C．
| D．
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| a |
| b |
| c |
| p |
| ||
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| p |
| A．[0，1] | B．[0，2] | C．[0，3] | D．[1，2] |
| a |
| a |
| a |
| a |
| cos2x+sin2x |
| a |
| b |
| a |
| b |
| OC |
| 5 |
| OC |
| a |
| b |
| a |
| b |
| m |
| a |
| m |
| b |
| m |
| m |
| A．2 | B．1 | C．
| D．
|
| a |
| b |
| c |
| p |
| ||
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| p |
| A．[0，1] | B．[0，2] | C．[0，3] | D．[1，2] |