For two vectors A and |barA+barB|=|barA-barB| is always true when (i) |barA|=|barB|ne0 "" (ii) A bot B (iii) |barA|=|barB|ne0 and A and B are paralle or anti parallel (iv) When either A or B is zero.

For two vectors A and |barA+barB|=|barA-barB| is always true when (i)

1.	For two vectors A and \|barA+barB\|=\|barA-barB\| is always true when (i) \|barA\|=\|barB\|ne0 "" (ii) A bot B (iii) \|barA\|=\|barB\|ne0 and A and B are paralle or anti parallel (iv) When either A or B is zero.
Answer» I and II are true ii, ii and IV are ture I, ii and C are true ii and iv are true Answer :D

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For two vectors A and |barA+barB|=|barA-barB| is always true when (i) |barA|=|barB|ne0 "" (ii) A bot B (iii) |barA|=|barB|ne0 and A and B are paralle or anti parallel (iv) When either A or B is zero.

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