If `vec(A), vec(B)` and `vec(C )` are three vectors, then the wrong relation is :

If vec(A) , vec(B) and vec(C ) are three vectors when you can say that vec(A) + vec(B) = vec(C ) and A+B = C are the same ?

If vec(a), vec(b) and vec(c) are three vectors such that vec(a) + vec(b) + vec(c) = vec(0) , then prove that vec(a) xx vec(b) = vec(b) xx vec(c) = vec(c) xx vec(a) .

If vec(a) , vec(b) and vec(c ) be three vectors such that vec(a) + vec(b) + vec(c )=0 and |vec(a)|=3, |vec(b)|=5,|vec(C )|=7 , find the angle between vec(a) and vec(b) .

If vec(a), vec(b)" and "vec(c) are three unit vectors such that vec(a)+vec(b)+vec(c)=vec(O) , find the value of vec(a).vec(b)+vec(b).vec(c)+vec(c).vec(a) .

If vec a,vec b and vec c are three mutually perpendicular vectors,then the vector which is equally inclined to these vectors is a.vec a+vec b+vec c b.(vec a)/(|vec a|)+(vec b)/(|vec b|)+(vec c)/(|vec c|) c.(vec a)/(|vec a|^(2))+(vec b)/(|vec b|^(2))+(vec c)/(|vec c|^(2))d|vec a|vec a-|vec b|vec b+|vec c|vec c

If vec a , vec ba n d vec c are three mutually perpendicular vectors, then the vector which is equally inclined to these vectors is a. vec a+ vec b+ vec c b. vec a/(| vec a|)+ vec b/(| vec b|)+ vec c/(| vec c|) c. vec a/(| vec a|^2)+ vec b/(| vec b|^2)+ vec c/(| vec c|^2) d. | vec a| vec a-| vec b| vec b+| vec c| vec c

If vec a , vec ba n d vec c are three mutually perpendicular vectors, then the vector which is equally inclined to these vectors is a. vec a+ vec b+ vec c b. vec a/(| vec a|)+ vec b/(| vec b|)+ vec c/(| vec c|) c. vec a/(| vec a|^2)+ vec b/(| vec b|^2)+ vec c/(| vec c|^2) d. | vec a| vec a-| vec b| vec b+| vec c| vec c