Ava Francis Trig Puzzle

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Across
  1. 3. the side that is not adjacent to the angle being considered
  2. 4. a straight line from the center to the circumference of a circle or sphere.
  3. 6. a branch of mathematics that deals with the relationships between the angles and sides of triangles
  4. 9. a unit of angular measure
  5. 12. length the distance along the edge of part of the circle
  6. 13. the ratio of the hypotenuse (in a right-angled triangle) to the side opposite an acute angle; the reciprocal of sine
  7. 16. a=1
  8. 17. the ratio of the hypotenuse to the shorter side adjacent to an acute angle (in a right-angled triangle); the reciprocal of a cosine.
  9. 19. a³ + b³ = (a + b)(a² - ab + b²).
Down
  1. 1. the ratio of the adjacent side to the opposite side in a right triangle.
  2. 2. refers to an algebraic expression of the form a³ - b³
  3. 5. of sector the measure of space inside a slice of the circle
  4. 7. having a common vertex and a common side
  5. 8. the longest side of a right triangle, opposite the right angle.
  6. 10. The tangent of an angle is the ratio of the length of the opposite side to the length of the adjacent side of that angle in a right triangle.
  7. 11. the trigonometric function that is equal to the ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.
  8. 14. the point of intersection of the coordinate axes
  9. 15. a mathematical expression involving constants (numbers), variables, and exponents, combined using addition, subtraction, and multiplication
  10. 18. Greatest common factor
  11. 19. the trigonometric function that is equal to the ratio of the side opposite a given angle (in a right triangle) to the hypotenuse