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If vecr.veca=vecr.vecb=vecr.vecc=1/2 for...

If `vecr.veca=vecr.vecb=vecr.vecc=1/2` for some non zero vector `vecr and veca,vecb,vecc` are non coplanar, then the area of the triangle whose vertices are `A(veca),B(vecb) and C(vecc0` is (A) `|[veca vecb vecc]|` (B) `|vecr|` (C) `|[veca vecb vecr]vecr|` (D) none of these

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