1. Bell Ringer 12-2-16 1. What are the six trig functions?
2. What are the possibilities for the x and y coordinates of “special” angles in the unit circle?
3. In what quadrants are each of the trig values positive?
4. What does “solve a right triangle” mean?

2. Trig functions of general angles
Friday, December 2, 2016

3. The Unit Circle in the Coordinate Plane
Yesterday we found the coordinate points of “special” angles.

4. What if we have a coordinate point?
Example #1

5. Quadrantal angles
Quadrantal Angles are angles with a terminal side on an axis.
Example #2

6. Reference angles
A reference angle is the acute angle between the terminal side of an angle and the x-axis.
30˚ is “like” 150˚ is “like” 210˚ is “like” 330˚ because they ALL have a reference angle of 30˚

7. Example #3

8. Use one trig function to find others
Example #4

9. When are the trig values positive and when are they negative?
Just remember:
If you want someone to be positive, Add Sugar To Coffee.

10. ONLY find sine and cosine
Assignments
Classwork:
Algebra 2 p #17-58
omit #45, 46 & 54
ONLY find sine and cosine
Homework: General Angles

11. Exit Ticket
1. What are quadrantal angles?
2. What is a reference angle?
3. In what quadrants is sine positive?
4. In what quadrants is cosine positive?