Pre-calculus crossword puzzle

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Across
  1. 4. sequence that involves addition or subtraction
  2. 7. summation notation
  3. 8. series that has first a first and last term
  4. 12. 1 over tan
  5. 13. straight line from circumference
  6. 15. how much a conic section varies from being circular
  7. 17. series that continues with no end
  8. 18. all inputs have one output
  9. 19. curve in graph that is U shaped
Down
  1. 1. set of values allowed to plug into function for x
  2. 2. line perpendicular to axis of parabola
  3. 3. used to represent an angle
  4. 4. line curve goes to as it is approaching infinity
  5. 5. other vertices starting with co
  6. 6. 1 over sin
  7. 9. 1 over cos
  8. 10. also called a foci
  9. 11. conic section that isnt hyperbola or parabola
  10. 14. 2 different curves that mirror each other
  11. 16. si unit of measuring angles