Math & Trigo Crossword Puzzle

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Across
  1. 2. The side is other than the opposite side. (Trigo)
  2. 5. An angle less than 90 degrees. (Trigo)
  3. 6. A sequence where each term is a multiple of the previous term. (Math)
  4. 8. Terms between two terms of a geometric sequence. (Math)
  5. 9. A sequence of numbers such that the difference between two consecutive terms is a constant. (Math)
  6. 11. Used to determine the values of the terms in the Fibonacci sequence. (Math)
  7. 14. The sum of its first n terms. (Math)
  8. 15. An angle of more than 90 degrees, but less than 180 degrees. (Trigo)
  9. 16. A sequence whose first two terms are and the succeeding terms are formed by adding the preceding two terms.(Math)
  10. 17. Translated the "Almagest". (Trigo)
  11. 18. The side opposite of the given angle. (Trigo)
  12. 20. The sum of the terms of a geometric sequence. (Math)
Down
  1. 1. The constant number for the difference between two consecutive terms. (Math)
  2. 3. An angle of exactly 180 degrees. (Trigo)
  3. 4. are obtained by finding the sum of the first n terms of an infinite series. (Math)
  4. 7. An angle of exactly 90 degrees. (Trigo)
  5. 10. A sequence of numbers whose terms are just the reciprocals of an arithmetic sequence. (Math)
  6. 12. The side opposite of the right angle. (Trigo)
  7. 13. Studies the properties of a triangle in a plane and its two-dimensional. (Trigo)
  8. 19. An angle of more than 180 degrees, but less than 360 degrees (Trigo)