Q: For two vectors A and B, |A+B|=|A-B| is always true when
(a) |A|=|B| ≠ 0
(b) A ⊥ B
(c) |A| = |B|≠ 0 and A and B are parallel or anti-parallel
(d) When either |A|or|B| is zero
Ans: (b) & (d)
Science and Education
Q: For two vectors A and B, |A+B|=|A-B| is always true when
(a) |A|=|B| ≠ 0
(b) A ⊥ B
(c) |A| = |B|≠ 0 and A and B are parallel or anti-parallel
(d) When either |A|or|B| is zero
Ans: (b) & (d)