Let P-=sqrt(3)e^(ipi/3), Q-=sqrt(3)e^(-p...

Let `P-=sqrt(3)e^(ipi/3), Q-=sqrt(3)e^(-pi/3) and R -=sqrt(3)e^(-ipi)`. If P,Q,R form a triangle PQR in the Argand plane, then `/_\ PQR` is (A) isosceles (B) equilateral (C) scalene (D) none of these

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