题文
△ABC外接圆的半径为1,圆心为O,且
,

,则

等于( ) 题型:未知 难度:其他题型
答案
C解析
该题暂无解析
考点
据考高分专家说,试题“△ABC外接.....”主要考查你对 [向量数量积的运算 ]考点的理解。
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