1. Practice Degree ____ Radian _____ (, ) I I III IV Degree ____ Radian _____ (, ) Degree ____ Radian _____ (, ) Degree ____ Radian _____ (, )

2. _______º __π/2_____ rad __0_____º _______ rad __60_____º _______ rad _______º ___π/4____ rad _30_____º _______ rad _______º __2π_____ rad Practice: Unit Circle Use formulas for radians to degrees to fill in the missing values

3. Periodic Angles If you are trying to find the value of a trig function for and angle larger than 2π remember that 2π makes one complete rotation and then starts over, so you can subtract 2π from the angle until you get an angle between 0 and 2π Example: sin 3π = sin 3π – 2π = sin π which is 0 from our unit circle, and trig functions.

4. Periodic Angles If you are trying to find the value of a trig function for and angle larger than 2π remember that 2π makes one complete rotation and then starts over, so you can subtract 2π from the angle until you get an angle between 0 and 2π Practice cos 10π Csc 7π/2

5. Assignment #3 pg. 381 21-30 all