If vec(a) + vec(b) + vec(c) = vec(0), |v...

If `vec(a) + vec(b) + vec(c) = vec(0), |vec(a)| = sqrt(37), |vec(b)| = 3` and `|vec(c)| = 4`, then what will be the angle between `vec(b)` and `vec(c)` ?

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The correct Answer is:

`theta = 60^(@)`

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