Consider the following points on the graph of y=sin(x)
https://docs.google.com/document/d/1aHUVqjrIYnITSuw5MIPSvx_XD-0UItgdCAeLTALxebo/edit?usp=sharing
Say that the terminal points of angles a and b are as follows:
Terminal point of a = (c1, c2)
Terminal point of b = (d1, d2)
Enter c1, c2, d1, d2 in that order.
Thanks!
(I've shown the points of y=sin(x) in the google doc link above)