- #1

- 352

- 87

[tex]x + yi = R e^{\theta i}[/tex]

Or from Cartesian to polar by:

[tex](R,\theta) =ln (x + yi) [/tex]

Why does this work? I just can't quite envision this. cosh and sinh have a similar relationship in that you could almost treat them as trig functions even though they're based on e.