While I enjoyed the history part towards the end it got super hand wavy; especially as it went from describing "i" as a rotation to e^ix; Better Explained does

While I enjoyed the history part towards the end it got super hand wavy; especially as it went from describing "i" as a rotation to e^ix; Better Explained does a fantastic job of explaining these from the first principles. https://betterexplained.com/articles/a-visual-intuitive-guide-to-imaginary-numbers/ https://betterexplained.com/articles/a-visual-intuitive-guid... https://betterexplained.com/articles/intuitive-understanding-of-eulers-formula/ https://betterexplained.com/articles/intuitive-understanding...