设向量a,b满足|a|=|b|及|3a-2b|=√7
设向量a,b满足|a|=|b|=1及|3a-2b|=3,若b=(0,1)求向量a的坐标
设向量a.b满足|a|=|b|=1,|3a-2b|=√7,求a+b与b夹角的大小
设向量a,b满足a绝对值=b绝对值=1及3a-2b绝对值=3,求3a+b绝对值的值
设向量a,向量b满足|向量a|=|向量b|=1,向量a●向量b=-1/2则|向量a 2向量b|等于
设向量a.b满足|a |=|b |=1,|3a-2b |=3,求|3a+b|
解一道向量题:设a,b满足|a|=|b|=1,|3a-2b|=√7 (题中字母都为向量)
设向量a b满足|a|=|b|=1及|3a+2b|=根号7,求a,b的夹角求|3a-b|的值
设向量a,b满足|a|=|b|=1及|3a-b|=√5,求|a+3b|的值 求3a-b与a+3b夹角的正弦值(急)
设单位向量a,b满足|3a-2b|=根号7,(1)求a,b的夹角,(2)求|3a+b|的值
设平面向量a b满足a-3b绝对值
设向量a,b满足lal=lbl=1,及l3a-2bl=根号7,求a,b夹角的大小,求l3a+bl的值
设向量a,b满足|a|=|b|=1,|3a-2b|=3,则求|3a+2b|=?