What is the use/need of complex numbers in real life if they are imaginary?
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The device that you are using right now, applies complex numbers all the time. Computer graphics take advantage of [quaternions](https://en.wikipedia.org/wiki/Quaternion) which are an extension of complex numbers. Similarly, those are also used in image processing.
Any device that handles sound, or transmits data over the network (radio, phones, wifi) need complex numbers. Signal processing (Fourier transformation) relies a lot on complex numbers.
I wish we could somehow rename them and not call them imaginary ever again.
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