7 4 evaluating and graphing sine and cosine
- 1. Objectives: 1. Use reference angles and special angles to evaluate sine and cosine functions 2. Graph sine and cosine functions.
- 2. The reference angle for any angle 慮 is: the positive acute angle formed by the terminal ray of 慮 and the x-axis.
- 3. We can evaluate any trig function for any angle by using its reference angle. Determine the sign by quadrant. Remember: All Students Take Calculus!
- 4. Express sin 695 in terms of a reference angle.
- 5. Express cos 200 in terms of a reference angle.
- 7. Evaluate each without looking at the unit circle. (Use the reference angle!)
- 8. Evaluate each without looking at the unit circle.