" 13.The angle between "A=$+$" and "B=$-$" is "

" If three vector "A,B" and "C" are "12,5" and "13" in magnitude such that "bar(c)=bar(A)+bar(B)" ,then the angle between "A" and "B" is "

The angle between Ai +j and B = i-j is

If barA xx barB =barB xx barA then the angle between A and B is :

If barA xx barB =barB xx barA then the angle between A and B is :

vecA.vecB=|vecAxxvecB| , then the angle between A and B is

If A and B are two vectors such that |A+B|=2|A-B|. The angle between vectors A and B is

If A and B are two vectors such that |A+B|=2|A-B|. The angle between vectors A and B is

If |vecA+vecB|=|vecA|=|vecB| then angle between A and B will be

If |vecA+vecB|=|vecA|=|vecB| then angle between A and B will be