1) One of the values of (1+i√2)23 is A) (12×√3+i) B) -i C) i D) −√3+i Answer: Option AExplanation:(1+i√2)2/3 = (1√2+1√2i)2/3 = (cos 45º + i sin45º)2/3 = (cos 2/3 × 45° + i sin 2/3 × 45°) = (cos 30° + i sin 30°) = √32+i×12 = 1/2 × (√3 +i)