If `vecp xx vecq = vecm xx vecn` and `vecp xx vecm = vecq xx vecn`, show that `vecp - vecn` is parallel to `vecq - vecm` where `vecp != vecn` and `vecq != vecm`

If vecp xx vecq = vecm xx vec n and vecp xx vec m = vecq xx vecn , show that vecp- vecn is parallel to vecq - vecm where vecp ne vecn and vecq ne vecm .

If vecp, vecq , vecr denote vectors vecbxxvecc, vecc xx vecc xx veca, vecaxx vecb . Respectively, show that veca is parallel to vecq xx vecr , vecb is parallel to vecrxx vecp , vecc is parallel to vecp xx vecq .\

If vecp, vecq , vecr denote vectors vecbxxvecc, vecc xx vecc xx veca, vecaxx vecb . Respectively, show that veca is parallel to vecq xx vecr , vecb is parallel to vecrxx vecp , vecc is parallel to vecp xx vecq .\

If vecp, vecq , vecr denote vectors vecbxxvecc, vecc xx vecc xx veca, vecaxx vecb . Respectively, show that veca is parallel to vecq xx vecr , vecb is parallel to vecrxx vecp , vecc is parallel to vecp xx vecq .\

if vecP +vecQ = vecP -vecQ , then

if vecP +vecQ = vecP -vecQ , then

If vecp = veca - vecb , vecq = vec a + vec b and |veca| = |vecb| = 2 , then the value of |vecp xx vecq| is equal to

Vectors vecm, vecn, vecr are such that vecm + vecn + vecr = 0 , prove that vecm xx vecn = vecn xx vecr = vecr xx vecm

If |vecP xx vecQ| = PQ , then angle between vecP and vecQ is

For three vectors vecP, vecQ and vecR, vecP+vecQ=vecR and P+Q=R Then prove that vecP and vecQ are parallel to each other.