1.

The angle between two adjacent sides →a and →b of a parallelogram is π6. If →a=(2,2,−1) and |→b|=2|→a|, then area of this parallelogram is

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The angle between two adjacent sides a and b of a parallelogram is π6. If a=(2,2,1) and |b|=2|a|, then area of this parallelogram is



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