#28 6.4

How many solutions does the equation have between o and 2 pi. Sin t = k , where k is a nonzero constant such that -1<1. So you have the domain of all possible sines. When you imagine this on the unit circle, imagine it as the y-value. For any one y-value, how many points are there on the unit circle. There are two. The points are reflected over the y-axis.