If ` vec a , vec ba n d vec c` are unit vectors satisfying `| vec a- vec b|^2+| vec b- vec c|^2+| vec c- vec a|^2=9,` then `|2 vec a+5 vec b+5 vec c|` is.

If vec a, vec b and vec c are unit vectors satisfying | vec a-vec b | ^ (2) + | vec b-vec c | ^ (2) + | vec c-vec a | ^ (2) = 9 then | 2vec a + 7vec b + 7vec c | =

If vec a, vec b and vec c are unit vectors then | vec a-vec b | ^ (2) + | vec b-vec c | ^ (2) + | vec c-vec a | ^ (2) is equal to

If vec a,vec b,vec c are unit vector,prove that |vec a-vec b|^(2)+|vec b-vec c|^(2)+|vec c-vec a|^(2)<=9

Let vec a, vec b, vec c are unit vector where | vec a-vec b | ^ (2) + | vec b-vec c | ^ (2) + | vec c + vec a | ^ (2) = 3 then | vec a + 2vec b + 3vec c | ^ (2) is equal to

If vec a, vec b and vec c are unit vectors satisfying the condition vec a + vec b + vec c = 0 then show that vec a.vec b + vec a.vec c + vec b * vec c = - (3) / (2)

If vec a, vec b and vec c are unit vectors satisfying the condition vec a + vec b + vec c = 0 then shoe that vec a.vec b + vec a.vec c + vec b * vec c = - (3) / (2)

[vec a + vec b, vec b + vec c, vec c + vec a] = 2 [vec a, vec b, vec c]

If vec a,vec b, and vec c are three vectors such that vec a xxvec b=vec c,vec b xxvec c=vec a,vec c xxvec a=vec b then prove that |vec a|=|vec b|=|vec c|

36. If vec a, vec b, vec c and vec d are unit vectors such that (vec a xx vec b) .vec c xx vec d = 1 and vec a.vec c = 1/2 then a) vec a, vec b and vec c are non-coplanar b) vec b, vec c, vec d are non -coplanar c) vec b, vecd are non parallel d) vec a, vec d are parallel and vec b, vec c are parallel

If vec a, vec b and vec c are non coplaner vectors such that vec b xxvec c = vec a, vec c xxvec a = vec b and vec a xxvec b = vec c then | vec a + vec b + vec c | =