1.

If overset(-)u=overset(-)a-overset(-)b, overset(-)v=overset(-)a+overset(-)b, |overset(-)a|=|overset(-)b|=2," then "|overset(-)u xx overset(-)v| is equal to

Answer»

`2 SQRT(16-(overset(-)a.overset(-)b)^(2))`
`sqrt(16-(overset(-)a.overset(-)b)^(2))`
`2 sqrt(4-(overset(-)a.overset(-)b)^(2))`
`sqrt(4-(overset(-)a.overset(-)b)^(2))`

ANSWER :A


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