If `( vec axx vec b)xx( vec cxx vec d)dot( vec axx vec d)=0` , then which of the following may be true? ` vec a , vec b , vec ca n d vec d` are necessarily coplanar b.` vec a` lies in the plane of ` vec ca n d vec d` c. ` vec b` lies in the plane of ` vec aa n d vec d` d. ` vec c` lies in the plane of ` vec aa n d vec d`

If ((veca xx vec b ) xx (vec c xx vec d)).(vec a xx vec d)= 0 , then which of the following is alaways true ?

If vec a , vec b , vec c , vec d are non-zero, non collinear vectors and if ( vec ax vec b)x( vec cx vec d)dot( vec ax vec d)=0 , then which of the following is always true. vec a , vec b , vec c , vec d are necessarily coplanar either vec a or vec d must lie in the plane of vec b and vec c either vec b or vec c must lie in plane of vec a and vec d either vec a or vec b must lie in plane of vec c and vec d

The vectors vec a,vec b,vec c,vec d are coplanar then

If vec a xxvec b=vec c xxvec d and vec a xxvec c=vec b xxvec d then show that vec a-vec d is parallel to vec b-vec c where a!=d and b!=c

If vec a xxvec b = vec c xxvec d and vec a xxvec c = vec b xxvec d then show that vec a-vec d is parallel to vec b-vec c

If | vec axx vec b|^2=( vec adot vec b)^2=144\ a n d\ | vec a|=4 , find vec bdot

If vectors vec a , vec b ,a n d vec c are coplanar, show that | vec a vec b vec c vec adot vec a vec adot vec b vec adot vec c vec bdot vec a vec bdot vec b vec bdot vec c|=odot

If vec a xxvec b=vec c xxvec d and vec a xxvec c=vec b xxvec d show that vec a-vec d is parallel to vec b-vec c, where vec a!=vec d and vec b!=vec c

If vec a xxvec b=vec c xxvec d and vec a xxvec c=vec b xxvec d show that vec a-vec d is parallel to vec b-vec c, where vec a!=vec d and vec b!=vec r

[vec a, vec b + vec c, vec d] = [vec a, vec b, vec d] + [vec a, vec c, vec d]