If a, b and c are unit vectors such that \[\mathbf{a}+\mathbf{b}-\mathbf{c}=0,\] then the angle between a and b is [Roorkee Qualifying 1998; MP PET 1999; UPSEAT 2000; RPET 2002]

If a, b and c are unit vectors such that \[\mathbf{a}+\mathbf{b}-\math

1.	If a, b and c are unit vectors such that \[\mathbf{a}+\mathbf{b}-\mathbf{c}=0,\] then the angle between a and b is [Roorkee Qualifying 1998; MP PET 1999; UPSEAT 2000; RPET 2002]
A.	\[\pi /6\]
B.	\[\pi /3\]
C.	\[\pi /2\]
D.	\[2\pi /3\]
Answer» E.

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If a, b and c are unit vectors such that \[\mathbf{a}+\mathbf{b}-\mathbf{c}=0,\] then the angle between a and b is [Roorkee Qualifying 1998; MP PET 1999; UPSEAT 2000; RPET 2002]

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