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STEP Support Programme

STEP 3 Complex Numbers


This module introduces you to STEP 3 questions involving Complex Numbers.

Each STEP 3 module consists of 4 STEP questions, some topic notes and useful formulae, a "hints" sheet and a "solutions" booklet.

STEP questions are challenging, so don't worry if you get stuck. These STEP 3 modules assume that you have already begun to develop your problem-solving skills and approach to STEP questions by working on the Foundation modules and the STEP 2 modules.

About this assignment

Complex numbers are very geometrical in nature, appearing as they do on an "Argand plane". There are various different ways of representing complex numbers which are useful in different situations.

Probably the most important thing to remember about complex numbers is the identity ${\rm e}^{i \theta} \equiv \cos \theta + i \sin \theta$. Taking $\theta = \pi$ gives the famous result ${\rm e}^{i \pi}+1=0$.

Useful Links

Underground Mathematics: Selected worked STEP questions

STEP Question database

University of Cambridge Mathematics Faculty: What do we look for?

University of Cambridge Mathematics Faculty: Information about STEP

University of Cambridge Admissions Office: Undergraduate course information for Mathematics

Stephen Siklos' "Advanced Problems in Mathematics" book (external link)

MEI: Worked solutions to STEP questions (external link)

Admissions Testing Service: Exam board information about STEP (external link)

AMSP (Advanced Maths Support programme): Support for University Admission Tests (external link)