trigonometry

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Across
  1. 4. reciprocal of tangent
  2. 5. study of relationships between angles and sides of triangles
  3. 6. unit for measuring angles based on arc length
  4. 8. circle circle with radius 1 used in trigonometry
  5. 9. traditional unit for angles
Down
  1. 1. reciprocal of cosine
  2. 2. line a graph approaches but never touches
  3. 3. angles that have a common terminal side
  4. 7. height from midline to peak of a wave