已知向量OA=(2.5)向量OB(3.1)向量OC(6.3)在OC上是否存在点M使向量M已知线段oa垂直ob向量MB如果存在求点M不存在说明理由

2.3.1 平面向量基本定理 课件(人教A版必修4)_百度文库
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你可能喜欢已知向量OA=(6,2),向量OB=(-1,2),若向量OC垂直向量OB,向量BC平行向量OA,求向量BC及向量BC与向量OB的夹角。
已知向量OA=(6,2),向量OB=(-1,2),若向量OC垂直向量OB,向量BC平行向量OA,求向量BC及向量BC与向量OB的夹角。 10
需要详细过程。谢谢。
OB⊥OC→0=OB×OC=(-1,2)(x,y)=-x+2y→x=2y
BC∥OA→3=6/2=(x+1)/(y-2)→3y-7=x=2y→y=7→x=14→BC=(14+1,7-2)=(15,5)
tan∠CBO=|OC|/|OB|=√(14?+7?)/√[(-1)?+2?]=7
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理工学科领域专家圆P按向量a平移后得到圆O。直线2x-4y+3=0与圆O相交与A,B两点,若在圆O上存在点C使向量OC=向量OA+向量OB=m*_百度知道
圆P按向量a平移后得到圆O。直线2x-4y+3=0与圆O相交与A,B两点,若在圆O上存在点C使向量OC=向量OA+向量OB=m*
圆P按向量a平移后得到圆O。直线2x-4y+3=0与圆O相交与A,B两点,若在圆O上存在点C使向量OC=向量OA+向量OB=m* 向量a,向量a=?
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出门在外也不愁如图,非零向量OA向量=a,OB向量=b,BC垂直于OA,C为垂足,设向量OC=ma,则m的值是多少_百度知道
如图,非零向量OA向量=a,OB向量=b,BC垂直于OA,C为垂足,设向量OC=ma,则m的值是多少
答案是ab/a^,请问向量的投影是实数还是向量,可以乘除吗?
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投影?应该是射影。是一个数。看公式,是一个向量的模乘一个三角,结果为实数。本题根据勾股定理得:OB的平方=BC方+OC方
换成向量解得m=ab/a方
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