If |vector(a + b)| = |vector(a - b)|, then (a) vector(a || a) (b) vector a is perpendicular to vector b (c) vector(|a| = |b|) (d) None of these

Question

If |vector(a + b)| = |vector(a - b)|, then

(a) vector(a || a)

(b) vector a is perpendicular to vector b

(c) vector(|a| = |b|)

(d) of these

Answer 1

Answer is (b) vector a is perpendicular to vector b