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Name: Date: School: Facilitator: 10.03 The Unit Circle Read each question carefully and fill-in your answer. 1. What are the three most common angles to use a reference angles? 2. What is the radian measure for 45°? 3. What is the degree measure for 6 ? 4. Within the unit circle, which direction will produce negative angles? 5. Within the unit circle, which direction will produce positive angles? Determine the correct signs for cosine and sine in each quadrant. Fill-in the space provided with “pos” for positive or “neg” for negative. 6. First Quadrant: sine: cosine: 7. Second Quadrant: sine: cosine: 8. Third Quadrant: sine: cosine: 9. Fourth Quadrant: sine: cosine: Fill-in the space provided with your work for each question. 10. Explain why 2 2 cos, sin , 2 2  for 45°. Include a drawing if necessary.
11. Complete the unit circle below. Enter your answers in the textboxes provided.

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