If z=reiθz = re^{i\theta}z=reiθ, express zˉ\bar{z}zˉ in polar form.
reiθre^{i\theta}reiθ
re−iθre^{-i\theta}re−iθ
−reiθ-re^{i\theta}−reiθ
e−iθe^{-i\theta}e−iθ