1. Convert from degree measure to radians: 1. 54° 2. -310° Convert from radian measure to degree measure: 3. 16π/15 4. -2π/5

2. 6-3

3. These curves are periodic, which means they repeat their y values over and over for a certain interval

7. Graphs are periodic, which means they repeat their y values over and over for a certain interval

9.  A PICTURE of all the SOLUTIONS!!!

15.  Domain: all real numbers.  Range: [-1, 1]  Period: 2π  X intercepts: kπ, where k is an integer  Y intercept: (0,0)  Max value: y = 1 when x = π/2 + 2πn, where n is an integer  Min value: y = -1 when x = 3π/2 + 2πn where n is an integer

17.  Domain: all real numbers.  Range: [-1, 1]  Period: 2π  X intercepts: π/2 + πn where n is an integer  Y intercept: (0,1)  Max value: y = 1 when x = πn, where n is an even integer  Min value: y = -1 when x = πn where n is an odd integer