If `vec(u) = vec(a) - vec(b) , vec(v) = vec(a) + vec(b)` and ` | vec(a) | = | vec(b) | =2` , then ` | vec(u) xx vec

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Q 2213267140.     If `vec(u) = vec(a) - vec(b) , vec(v) = vec(a) + vec(b)` and ` | vec(a) | = | vec(b) | =2` , then ` | vec(u) xx vec(v) |` is

`sqrt(16- (vec(a) * vec(b))^2)`
A True
B False

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(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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