Chapter 6 - The Circular Functions and Their Graphs - 6.2 The Unit Circle and Circular Functions - 6.2 Exercises - Page 587: 1

The missing coordinates are: $90^o: (0, 1)$ $60^o: (\frac{1}{2}, \frac{\sqrt3}{2})$ $45^o: (\frac{\sqrt2}{2}, \frac{\sqrt2}{2})$ $30^o: (\frac{\sqrt3}{2}, \frac{1}{2})$ $0^o: (1, 0)$

Using Figure 13 on page 579 of this book, the coordinates of the points indicated are: $90^o: (0, 1)$ $60^o: (\frac{1}{2}, \frac{\sqrt3}{2})$ $45^o: (\frac{\sqrt2}{2}, \frac{\sqrt2}{2})$ $30^o: (\frac{\sqrt3}{2}, \frac{1}{2})$ $0^o: (1, 0)$