Introduction to Matrices Matrices are a useful way to represent and manipulate data in order to model situations. The elements in a matrix can represent data, equations or systems and have many rea...
Frequency & Phase of Trig Functions How are complex numbers and trig functions related? A sinusoidal function is of the form a sin(bx + c) a represents the amplitude b represents the period (al...
Modulus-Argument (Polar) Form How do I write a complex number in modulus-argument (polar) form? How do I multiply complex numbers in modulus-argument (polar) form? The main benefit of writing compl...
Geometry of Complex Addition & Subtraction What does addition look like on an Argand diagram? In Cartesian form two complex numbers are added by adding the real and imaginary parts When plotted...
Argand Diagrams What is the complex plane? The complex plane, sometimes also known as the Argand plane, is a two-dimensional plane on which complex numbers can be represented geometrically It is si...
Modulus & Argument How do I find the modulus of a complex number? What features should I know about the modulus of a complex number? How do I find the argument of a complex number? The argument...
Complex numbers are a set of numbers which contain both a real part, and an imaginary part. Cartesian Form What is an imaginary number? What is a complex number? What is Cartesian Form? Exam Tip Re...
Amortisation What is amortisation? Amortisation is the process of repaying a loan over a fixed period of time Most commonly questions will be about mortgages (loans taken out to buy a home) or loan...
Compound Interest What is compound interest? Interest is a small percentage paid by a bank or company that is added on to an initial investment Interest can also refer to an amount paid on a loan o...
