Complex Analysis, Video #11 (Complex Arithmetic, Part 11). Complex reciprocal (multiplicative inverse), Complex Division, Intro to Complex Conjugate.
Details: Review complex reciprocal & complex division. Introduce complex conjugate as something that is helpful in doing complex number division...the idea (geometrically), notation, and formula. A complex number times its complex conjugate is real and is the square of the modulus of the original complex number. Rewrite modulus and argument principles for multiplication in terms of division.