Degrees and radian conversions and introduction to periodic functions.

1. Why are there 360° in a circle?
What is the most quot;naturalquot; way to measure
angles?
Periodic Functions
Circles by flickr user tydan

5. How do we convert between radians and degrees?
D is an angle in degrees
R is an angle in radians
θ is called quot;thetaquot;
Examples:
Find 30° in radians ... Find 20° in radians ...

6. Find 250° in radians ... Find in degrees ...

7. Find -18° in radians ... Find in degrees ...

8. Find in degrees ...

9. What does periodic mean?
Clock photo source

10. What does periodic mean?
Jupiter and Io photo source

11. What does periodic mean?
Low tide photo source

12. What does periodic mean?
Baby heartbeat photo source

13. What does periodic mean?
Heartbeat of Trees photo source

14. The sine curve (graph) ... HOMEWORK

15. HOMEWORK

16. HOMEWORK

17. HOMEWORK

18. HOMEWORK