May be its not the right place to ask this, but mods can move this to other parts of the forum(i encountered it while leaning diff equations)...

I would like to know how to find $\displaystyle \Re(-\frac{2}{e^{ix}+i})$ in trigonometric form or polar form, so please try to show all the steps(Thinking).

It would also be very helpful if someone could post a link to learn converting complex exponentials to trignometric functions, or just how to find out the real part of the complex exponential in trignometric form.

Thanks