Trigonometry

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Across
  1. 3. a mathematical relation associating elements between sets
  2. 6. the point at which a line intersects a coordinate axis
  3. 8. the side of a right triangle opposite the right angle
  4. 9. a set of possible values of the independent variable
  5. 10. ratio of the opposite and adjacent sides of a right triangle
  6. 11. exact reflection of form on opposite sides of a line.
Down
  1. 1. Two trigonometric functions, such as sine and cosine, for which the value of the first function at an acute angle equals the value of the second function at the complement of that angle.
  2. 2. set of values of a variable for which a function is defined
  3. 4. a measure for arcs and angles
  4. 5. any of the four areas into which a plane is divided
  5. 7. a straight line extending from a point
  6. 11. ratio of the hypotenuse to the adjacent side of a right-angled triangle