Can someone explain to me how I find the real and the imaginary part of $e^{\theta i}$?
I'm learning complex numbers but I don't quite understand how $e$ is intertwined in all this.
How to find $\lim_{h\rightarrow 0}\frac{\sin(ha)}{h}$ without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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