Q.
If the sum of two unit vectors is a unit vector, then magnitude of difference in two unit vectors is
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a
2
b
3
c
1/2
d
5
answer is B.
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Detailed Solution
Sum of two unit vectors is a unit vector, means angle between those two unit vectors is 1200∴ Difference, |S|=1+1-2×1×1×cos120°=3
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