Math Refreshed

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Across
  1. 6. line passes through a center of a circle
  2. 8. manual calculator with sliding beads
  3. 10. 3.141459265
  4. 11. sin x / cos x
  5. 12. electronic device to solve math problems
  6. 14. longest side of a right triangle
  7. 15. study of mathimatical symbols
  8. 16. defines continuity and derivatives
Down
  1. 1. opposite of tangent
  2. 2. learn develeopmental classes in math
  3. 3. repeated application of a rule
  4. 4. not a whole number
  5. 5. two lines meet at a right angle
  6. 7. 90 degrees
  7. 9. y= f(x)
  8. 13.