Quadtratic equation, parametesr, root locus, Argand diagram.

[STEP III 2012 Question 6 (Pure)]

Argand diagram, equilateral triangle, rotation, centroid.

[STEP III 2008 Question 7 (Pure)]

Argand diagram, 12-gon, rotation.

[STEP II 2001 Question 7 (Pure)]

Argument, imaginary part, inequality, proof.

[STEP II 1993 Question 9 (Pure)]

Argand diagram, locus.

[STEP I 1992 Question 4 (Pure)]

Argand diagram, path.

[STEP I 1991 Question 3 (Pure)]

Argand diagram, locus, curve sketching.

[STEP III 1988 Question 3 (Pure)]