**Learning objectives**

- Master the arithmetic of complex numbers, including Euler’s formula
- Appreciate a beautiful proof of the Fundamental Theorem of Algebra
- Have fun with Gaussian integers

**Before class**

- Read Lay Appendix B
- Review the power series of exp(t), cos(t), and sin(t) (if you have studied them before)
- Post to Piazza
- Do WeBWorK assignments.
- Prepare for Spring Break

**In class**