If the vectors `(hati+hatj+hatk)` and `3 hati` form two sides of a triangle, then area of the triangle is :
If the vectors `(hati+hatj+hatk)` and `3 hati` form two sides of a triangle, then area of the triangle is :
A. `sqrt(3)` unit
B. `2sqrt(3)` unit
C. `(3)/sqrt(2)` unit
D. `3sqrt(2)` unit
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