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`        plz expain argand diagram and its applications??`
7 years ago

bibhash jha
15 Points
```
The complex plane is called an argand diagram.  It is  used to plot a complex number.  On the horizontal axis are the real  numbers and on the vertical axis are the imaginary numbers.  Here is an  example of an argand diagram:

As in polar co-ordinates, a complex number can be defined by its  distance from the origin (modulus) and angle (in radians) from the  positive real axis (argument).  It can be written as (r,θ), wher r is  the modulus and θ is the argument.  A complex number, x+i.y, is the same  as r(cos(θ) + sin(θ)).  Then there is an identity r(cos(θ) + sin(θ)) =  reiθ, which can be checked by differentiating both sides.  From this comes a very interesting result; eiπ = -1.

```
7 years ago
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