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Let vec(a) and vec(b) be the two unit ve...

Let `vec(a)` and `vec(b)` be the two unit vectors such that angle between them is `60^@`. Then `|vec(a)-vec(b)|` is equal to: (a) `sqrt(5)` (b) `sqrt(3)` (c) 0 (d) 1 (e) `sqrt(2)`

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