" al.If "|vec a timesvec b|=|vec a*vec b|" the the angle between "vec a" and "vec b=vec b

If |vec a|=|vec b|=|vec a-vec b| then the angle between vec a and vec b is

If |vec a - vec b| = |vec a| = |vec b| =1 then the angle between vec a and vec b is

If vec a and vec b are vectors such that |vec a + vec b| = |vec a - vec b| , then the angle between vec a and vec b is

If vec a and vec b are non - zero vectors and |vec a+ vec b| = |vec a - vec b| , then the angle between vec a and vec b is

If vec a. vec b = ~ |vec a||vec b| then angle between vec a and vec b is

if |vec A+vec B|=|vec A|=|vec B|, then the angle between vec A and vec B is

If |vec A-vec B|=|vec A|+|vec B| ,then the angle between vec A and vec B is

If |vec A+vec B| = |vec A|-|vec B| , then the angle between vec A and vec B is

If |vec a+vec b|=|vec a-vec b| .Prove that the angle between vec a and vec b is 90^(@) ?

If |vec A + vec B|= |vec A|+|vec B| , then what is the angle between vec A and vec B .