If the sum of two unit vectors is a unit vector, then magnitude of dif – McqOptions

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1.	If the sum of two unit vectors is a unit vector, then magnitude of difference is [CPMT 1995; CBSE PMT 1989]
A.	\[\sqrt{2}\]
B.	\[\sqrt{3}\]
C.	\[1/\sqrt{2}\]
D.	\[\sqrt{5}\]
Answer» C. \[1/\sqrt{2}\]

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