11. Graphing Complex Numbers

Express the complex number $z=2-4i$ in the polar form.

Convert the complex number $z=\(\sqrt\)2\(\left\)(\(\cos\]\frac{7\pi}{4}\)+i・\(\sin\[\frac{7\pi}{4}\]\right\))$ from polar to rectangular form.

Express the complex number $z=1-\frac{\sqrt{3}}{3}i$ in polar form.

Convert the complex number $z=12\(\left\)(\(\cos\)90\(\degree\)+i・\(\sin\)90\(\degree\]\right\))$ from polar to rectangular form.

Express the complex number $z=7+11i$ in polar form.