If a and b are two unit vectors such that a + b is also a unit vector, then | a - b |^2=

Step-by-step solution

If resultant of two unit vectors is unit vector, then angle between them is 2 3 , so aligned | a - b |^2 & =|a|^2+|b|^2-2| a || b | 2 3 & =1+1-2(1)(1)(-1 / 2)=2+1=3 . aligned