Answer:
13. c. -3/5
14. {5/6, 3 1/3, 5 5/6, 8 1/3}
Explanation:
13. The sine is the ratio of the y-coordinate to the distance from the point to the origin. That distance is 5, and the y-coordinate is -3, so the sine is ...
sin(θ) = -3/5
__
14.

see the attachment for the solution from a graphing calculator