I want to learn how to find the angels A with:
0, less than or equal, A ,less than or equal to, 2pi that satisfy equations such as these:
sin A = -1 (I got, -90, and 90 degrees)
cos A= 1 (I got, 0)
sin A= 0.4 (I got, 23.5782 and 156.4218 degrees)
cos A= -0.6 (I got...