题文
已知|
|=1,|

|=

,

=0,点C在∠AOB内,且∠AOC=30°,设

=m

+n

(m、n∈R),则

等于( ) 题型:未知 难度:其他题型
答案
3解析
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考点
据考高分专家说,试题“已知||=1,||=,=0,.....”主要考查你对 [向量数量积的运算 ]考点的理解。
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