Hi, I meant why z = cosθ + jsinθ not Euler's formula.
Is z a vector? Why not use vector symbol anywhere here? I can't figure out the equation z = cosθ + jsinθ.
I use complex number a lot but not really understand it.
My confusion is in the equation z = cosθ + j sinθ
z is the distance from origin O to z point. It is a real number
But cosθ + j sinθ is clearly a complex number.
A real number is impossible to equal to a complex number. That is what I can't get.