Under what consition :
(a) resulant of tow vectors will be zero
(b) sum of the two vectors is equal to their differenc
(c) the magnitude of sum of two vectros is equal to the magnetude of diffrence between them .

Answer

(a) If the vectors are equal and oppsite, (b) If one of the vectors is a null vectors, (c) if the vectors are orthogonal

Explanation

(a) If the vectors are equal and opposite.
(b) If one of the vectors is a null vector.
(c) If the vefctors are perpendicular to each other.