Mathematics Crossword Puzzle

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Across
  1. 3. The reciprocal of the cosine function.
  2. 4. The ratio of the opposite side to the hypotenuse in a right-angled triangle.
  3. 5. The measure of the space inside a three-dimensional object.
  4. 7. The coefficients of the variables in an equation.
  5. 9. The first term of an arithmetic progression.
  6. 12. The number of square units that cover the surface of a three-dimensional object.
  7. 16. A sequence of numbers where the difference of any two successive members is a constant.
  8. 19. The sum of the first 'n' terms in an arithmetic progression.
  9. 20. The branch of mathematics that deals with the relationships between the angles and sides of triangles.
Down
  1. 1. A system with no solution or infinite solutions.
  2. 2. The difference between consecutive terms in an arithmetic progression.
  3. 6. A polynomial with three terms.
  4. 8. The point where two lines intersect.
  5. 10. The process of dividing polynomials.
  6. 11. The sum of the areas of all surfaces of a three-dimensional object.
  7. 13. A polynomial of degree zero.
  8. 14. The highest power in a polynomial equation.
  9. 15. The measure of space occupied by a three-dimensional object.
  10. 17. An expression that represents a mathematical relationship between two variables.
  11. 18. The ratio of the adjacent side to the hypotenuse in a right-angled triangle.