Question

If vectors vec(A) and vec(B) are such that |vec(A)+vec(B)|=|vec(A)|=|vec(B)| , then |vec(A)-vec(B)| may be equated to (A) sqrt3/2 |vecA| (B) |vecA| (C) sqrt2 |vecA| (D) sqrt3|vecA|

Answer 1

Answer:

the correct answer is

a to the root of 7 is the answer