Warm Up
Find the following values for the angles:
1. cos 45
2. sin 240
3. cos 330
4. sin 120
Positive and Negative angles in
Trig
Reference angles in Trig
45
30
60
If you know the reference angle, and the
quadrant, you can figure out the
coordinates of each angle.
30
45
60
150
135
120
210
225
240
330
315
300
Co-Terminal Angles - have same
coordinates
1. 495
2. -330
3. 945
4.
-60
Tangent =