1.

The vectors \(\vec A\) and \(\vec B\) are such that |\(\vec A\) +\(\vec B\)| = |\(\vec A\) – \(\vec B\)|. The angle between the two vector is ………(a) 45° (b) 60° (c) 75° (d) 90°

Answer»

(d) 90°

The angle between two vector is always  90°.



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