If `veca and vecb` are unit vectors such that `(veca +vecb). (2veca + 3vecb)xx(3veca - 2vecb)=vec0` then angle between `veca and vecb` is

If veca and vecb are unequal unit vectors such that (veca -vecb) xx [(vecb+veca) xx (2veca+vecb)]=veca+vecb , then angle theta between veca and vecb can be

If veca and vecb are unequal unit vectors such that (veca - vecb) xx[ (vecb + veca) xx (2 veca + vecb)] = veca+vecb then angle theta " between " veca and vecb is

If veca and vecb are unequal unit vectors such that (veca - vecb) xx[ (vecb + veca) xx (2 veca + vecb)] = veca+vecb then angle theta " between " veca and vecb is

If veca and vecb are unequal unit vectors such that (veca - vecb) xx[ (vecb + veca) xx (2 veca + vecb)] = veca+vecb then angle theta " between " veca and vecb is

If veca * vecb = |veca xx vecb| , then this angle between veca and vecb is,

If veca and vecb are two vectors such that |veca|=1, |vecb|=4, veca.vecb=2 . If vecc=(2veca xx vecb)-3vecb , then the angle between veca and vecc is

If veca,vecb are two unit vectors such that |veca + vecb| = 2sqrt3 and |veca -vecb|=6 then the angle between veca and vecb , is