Question

If resultant of two unit vectors a and b is also a
unit vector, then magnitude of difference of
a and b is
(1) Zero
(2) 1
(3) 3^1/2 (4) 2^1/2​

Answer 1

Answer:

1

Explanation:

2nd option is correct answer

Answer 2

Answer:

(3) √3

Explanation:

angle b/w a and b = 120°

so, angle b/w "a" and "-b" = 60°

|a-b| = 2 cos(60°/2) = 2 cos (30°) = 2× √3/2 = √3