The Argand Diagram sigma-complex It is very useful to have a graphical or pictorial representation of complex numbers. For example, the complex. are quantities which can be recognised by looking at an Argand diagram. number, z, can be represented by a point in the complex plane as shown in Figure 1. The easiest way to geometrically represent a complex number is by using an Argand Diagram (see above). The point Complex_files\Complex_MathML_jpg .

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The value of is given by.

## Complex Plane

A complex number,is a combination of a real number and an imaginary number, and is written in the form or. For example, if the point is in the third quadrant, so that both and are negative, gives the value of the angle in the first quadrant, whereas the true value is. As always, it is a good idea to sketch an Argand diagram. About Me EeHai I like to use blogging to share information and also learn new things from other blogs.

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Whilst conversion from cartesian to polar form is straightforward, conversion from polar to cartesian form can be a little more tricky. For aargand aspects of dealing with complex numbers, this form can be a lot more useful. Not seeing a widget?

Two complex numbers are equal if and only if both their real and imaginary parts are equal i. Historically, the geometric representation of a complex number as a point in the plane was important because it made the whole idea of a complex number more acceptable.

Then, diagrxm a line from 0 to the point you just plotted. Hints help you try the next step on your own. Some other properties are represented by the line on the Argand diagram.

First cokplex published Paris, View my complete profile. The vertical axis represents imaginary rumbers. Answered by Thomas L. The modulus or amplitude can also be obtained from this Argand diagram. Also,so that. Argand Diagram Eric W. Farrar, Straus and Giroux, As you probably know, complex numbers are made up of a combination of real diagrsm imaginary numbers.

Complex numberswhich are imaginary roots to equation, can be represented in a special graph called the Argand diagram. Category Algebra 65 applications 31 area 13 arband 28 afgand number 23 concept 36 determinant 2 Fun 2 Fun in maths 35 Geometry 33 graph 28 graphical art 11 indices 19 Learning 11 Learning maths 88 Logarithm 23 logic 3 maths anxiety 14 maths applications 5 maths game 2 maths symbols 7 maths technique 18 Maths Thinker 30 matrices 10 Measurement 1 mental maths 21 mistakes 34 Number 84 principles 22 simultaneous equations 8 speed 6 statistics 2 teaching maths 30 Team spirit 1 time 1 Trigonometry 45 velocity 1 Video The complex number in cartesian form is therefore.

Answered by Charlie M.

Answered by Jasmin D. Answers Further Mathematics A Level. This is called the polar form of the complex number as distinct from the cartesian form shown aboveand is frequently abbreviated by either or.

The value of is given by and the value of is given by. About the author Peter W.

The set of all points representing all complex numbers is called the complex plane. Menu Log in Sign up. How can we describe complex numbers?

### Argand Diagram — from Wolfram MathWorld

Since all represent the argajd point, it is conventional to restrict the range diagrqm the argument to. Mostly, though, it is used to show complex numbers. An Argand diagram has two axes, like a regular cartesian graph. As an alternative to using Cartesian co-ordinates, it is possible to specify the point by the length of the line connecting the origin with the point and the angle this line makes with the positive real axis see diagram below.