If vector ` vec a+ vec b` bisects the angle between ` vec a` and ` vec b` , then prove that `| vec a|` = `| vec b|` .

Find the angle between two vectors vec a and vec b, if |vec a xxvec b|=vec avec b

Find the angle between two vectors vec a and vec b, if |vec a xxvec b|=vec a*vec b

For any vector vec a and vec b prove that |vec a+vec b|<=|vec a|+|vec b|

If vec a and vec b are unit vectors find the angle between vec a+vec b and vec a-vec b

If |vec A+ vec B| = |vec A| + |vec B | , then angle between A and B will be

If vec a,vec b and vec c are three unit vectors such that vec a*vec b=vec a*vec c=0 and angle between vec b and vec c is (pi)/(6) prove that vec a=+-2(vec b xxvec c)

If vec a and vec b are unit Vectors,then what is the angle between vec a and vec b so that sqrt(2)vec a-vec b is a unit vector?

If vec a,vec b, and vec c are three vectors such that vec a xxvec b=vec c,vec b xxvec c=vec a,vec c xxvec a=vec b then prove that |vec a|=|vec b|=|vec c|

If |vec a|+|vec b|=|vec c| and vec a+vec b=vec c, then find the angle between vec a and vec b

The non-zero vectors vec a,vec b,vec c are related by vec a=8vec b and vec c=-7vec b then the angle between vec a&vec c