Maths Crossword

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Across
  1. 2. sin^2 + cos^2
  2. 4. adj/hyp
  3. 6. opp/adj or a line that touches a circle at one point
  4. 9. opp/hyp
  5. 12. "Rate of change" means do this!
  6. 13. Passes the vertical line test
Down
  1. 1. The opposite of differentiation
  2. 3. The ratio of a circle's circumference to its diameter
  3. 5. The inverse of e^x
  4. 7. Fails the vertical line test
  5. 8. The numbers output from a function
  6. 10. Numbers represented by the symbol Z
  7. 11. The mathematician whom "e" is named after
  8. 12. Numbers input to a function