**Learning objectives**

- Work with polar coordinates in the plane
- Work with cartesian, cylindrical, and spherical coordinates in 3-space

**Before class**

- Read Hughes-Hallett sections 16.3, 16.4, 16.5,
- Ponder Hughes-Hallett problems: 16.4: 3, 4, 9, 11, 13, 15, 21, 25, 26, 31, 32, 33; 16.5: 1, 9, 11, 12-18, 27, 28, 29.
- Post to Piazza
- Write solutions to problems 16.1: 4, 22 and 16.2: 14, 16, 20, 44 to turn in at the beginning of class.
- Complete HW7 on WeBWork

**In class**

- Discuss last week’s test
- Work with polar, cylindrical, and spherical coordinates