PreCalculus

1. - The graph of a function with two branches that open away from each other.
4. - A scalar value that can be computed from the elements of a square matrix.
5. - The length of a vector.
6. - A rectangular array of numbers or functions.
7. - The ratio of the adjacent to the opposite side in a right triangle.
11. - A unit of measure for angles.
12. - The reciprocal of the sine function.
15. - The reciprocal of the cosine function.
16. - The length of one complete cycle of a periodic function.
17. - The maximum absolute value of a periodic function.
19. - A quantity with only magnitude.
20. - A relation between inputs and outputs where each input is related to exactly one output.

2. - A line that a graph approaches but never touches.
3. - A function in which an independent variable appears in the exponent.
8. - The set of all points for which the sum of the distances to two fixed points is constant.
9. - The ratio of the opposite to the adjacent side in a right triangle.
10. - The study of the properties of triangles.
13. - The graph of a quadratic function.
14. - A quantity with both magnitude and direction.
18. - The inverse operation to exponentiation.