cis - what is it, what is it for?

cis is a way of representing complex numbers in polar form. The math of complex numbers is actually much easier in polar form so we will spend several days playing with it. And then we have a test.

5/03 cis, Products and Quotients of Complex Numbers
       HW B p.406-407/10, 12, 15, 17, 24-31
5/05 Powers and Roots of Complex Numbers
       HW B p.410-411/4,5,9-14 and p.413/5,6,8,11-13