Vectors `vec(a), vec(b)` and `vec(c )` are such that `vec(a) + vec(b) + vec(c ) = 0` and `|vec(a)| = 3, |vec(b)| = 5` and `|vec(c )| = 7`. Find the angle between `vec(a)` and `vec(b)`.

If vec a + vec b + vec c = 0 and |vec a|= 3, |vec b| = 4 and |vec c| = sqrt37 , then the angle between vec a and vec b is

Suppose vec a + vec b + vec c = 0, |vec a| = 3, |vec b| = 5, |vec c| = 7 , then the angle between vec a and vec b is

If vec(A)+vec(B)+vec(C)=0 and |vec(A)|=4,|vec(B)|=5 and |vec(C)|=1 , then the angle between vectors vec(B) and vec(C) is equal to

If two vectors vec(a) and vec(b) such that |vec(a)| = 2|vec(b)| = 3 and vec(a).vec(b) = 6 , find |vec(a)-vec(b)| .

If vec(a), vec(b),vec(c ) are three vectors such that |vec(a)| = 5, |vec(b)| = 12 and |vec(c )| = 13 and vec(a) + vec(b) + vec(c ) = vec(0) , find the value of vec(a).vec(b) + vec(b).vec(c )+vec(c ).vec(a) .

If |vec a - vec b| = |vec a| = |vec b| =1 then the angle between vec a and vec b is

If vec(a) and vec(b) are the vectors such that |vec(a)|=3sqrt(3), |vec(b)|=4 and |vec(a)+vec(b)|=sqrt(7) , then the angle between vec(a) and vec(b) is

Find |vec(b)| , if (vec(a) + vec(b)).(vec(a) -vec(b)) = 8 and |vec(a)| = 8|vec(b)|

If vec(a), vec(b), vec(c ) are unit vectors such that vec(a) + vec(b) + vec(c )= vec(0), " then " vec(a).vec(b) + vec(b).vec(c ) + vec(c ).vec(a) =

If |vec(a)| = 5, |vec(b)| = 6 and the angle between vec(a) and vec(b) is 60^(@) , then vec(a).vec(b) =