" 7.If "|vec a timesvec b|^(2)+|vec a*vec b|^(2)=400" and "|vec a|=5" ,then write the value of "vec b|" ."

If |vec axvec b|^(2)+|vec a*vec b|^(2)=400 and |vec a|=5 then write the value of |vec b|

If | vec a X vec b|^2+| vec adot vec b|^2=400 and | vec a|=5, then write the value of | vec b|dot

If |vec(a) xx vec(b)|^(2) + |vec(a) .vec(b)|^(2) = 400 and |vec(a)| = 5 , then write the value of |vec(b)| .

Solve (vec a timesvec a)*vec b

If |vec a|=2|vec b|=5 and |vec a xxvec b|=8, then find the value of vec a.vec b.

If | vec a|=2| vec b|=5 and | vec axx vec b|=8, then find the value of vec a . vec bdot

If | vec a|=2| vec b|=5 and | vec axx vec b|=8, then find the value of vec a . vec bdot

Let vec a , vec b , vec c are three vectors , such that vec a + vec b + vec c = vec 0 .If , |vec a|=3 , |vec b|=4 and | vec c|=5 , then the value of, |vec a+vec b|^(2) + |vec b-vec c|^(2) + |vec c+vec a|^(2) , equal to :