If `| vec a|=| vec b|=| vec a+ vec b|=1,` then find the value of `| vec a- vec b|dot`

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| =5, |vec b|=13 , |vec a timesvec b|=25 then find the value of vec a*vec b

If two vectors vec a and vec b are such that |vec a|=2,|vec b|=1 and vec avec b=1, then find rthe value of (3vec a-5vec b)2vec a+7vec b

If |vec a|=2,|vec b|=1 and vec a*vcb=1 then find the value of (3vec a-5vec b)*(2vec a+vec 7vec b)

if | vec a | = | vec b | = | vec a + vec b | = 1 then | vec a-vec b |

If |vec a|=5,|vec a-vec b|=8 and |vec a+vec b|=10, then find |vec b|

Given |vec a|=|vec b|=1and|vec a+vec b|=sqrt(3). If vec c is a vector such that vec c-vec a-2vec b=3(vec a xxvec b), then find the value of vec cvec b

If vec a, vec b and vec c are perpendicular to vec b + vec c, vec c + vec a, vec a + vec b respectively and if | vec a + vec b | = 6, | vec b + vec c | = 8 and | vec c + vec a | = 10 then find the value of vec a + vec b + vec c

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 :

If vec a,vec b and vec c be three vectors such that vec a+vec b+vec c=0,|vec a|=1,|vec c|=3,|vec b|=2, Then find the value of vec a.vec b+vec b.vec c+vec c.vec a