Unit 13 Puzzle #2

5. The trig function that is restricted to quadrants I and II.
7. One of the trig functions restricted to quadrants I and IV.
8. The six trigonometric functions that are defined by the unit circle.
10. Two angles in standard position having the same terminal side. Infinitelymany Every angle has __________ coterminal angles.
13. The angles of a circle can be measured in degrees or ______.
14. To find coterminal angles in _______, add or subtract a multiple of 360o.
17. Restricted values in the domain of the trigonometric functions so that the inverses are functions.
19. One of the two rays of an angle that rotates about the origin.

1. Angles that have their terminal side on an axis.
2. The least positive value of a for which f(x) = f(x + a) is called the period of the function.
3. When terminal sides rotate around the unit circle, they make one or more __________.
4. The circle in a coordinate plane with a radius of one unit and its center is located at the origin.
6. The measure of an angle when the angle is rotated in a clockwise direction.
9. An angle positioned so that its vertex is at the origin and its initial side is along the positive x-axis.
11. If the __________ of an angle θ in standard position intersects the unit circle at P(x,y), then cos θ = x and sin θ = y.
12. One of the two rays of an angle that is fixed along the positive x-axis.
13. To find coterminal angles in _______, add or subtract a multiple of 2π.
15. The measure of an angle is determined by the amount of ________ from the initial side to the terminal side.
16. One of the trig functions restricted to quadrants I and IV.
18. The measure of an angle when the angle is rotated in a counterclockwise direction.