Stonehenge, in southern England, was built thousands of years ago to help keep track of the seasons. At dawn on the summer solstice the sun can be seen through these giant stone slabs. Fig. 1-CO, p. 1

Fig. 1-1a, p. 2

Fig. 1-1b, p. 2

Table 1-1, p. 3

Table 1-2, p. 3

Table 1-3, p. 3

Table 1-4, p. 3

Figure 1.2 Levels of organization in matter. Fig. 1-2a, p. 4

Figure 1.2 Levels of organization in matter. Fig. 1-2b, p. 4

Table 1-5, p. 5

The speed limit is given in both kilometers per hour and miles per hour on this road sign. How accurate is the conversion? p. 10

Figure 1.3 In this deep-space photograph, there are few stars—just galaxies without end. Fig. 1-3, p. 13

Figure 1.4 Designation of points in a two-dimensional Cartesian coordinate system. Every point is labeled with coordinates (x, y). Fig. 1-4, p. 14

Figure 1.5 The plane polar coordinates of a point are represented by the distance r and the angle , where  is measured counterclockwise from the positive x-axis. Fig. 1-5, p. 14

Active Figure 1.6 Certain trigonometric functions of a right triangle. Fig. 1-6, p. 15

Active Figure 1. 7 (Example 1 Active Figure 1.7 (Example 1.9) Converting from Cartesian coordinates to polar coordinates. Fig. 1-7, p. 15

Figure 1.8 (Example 1.10) Figure 1.8 (Example 1.10) Fig. 1-8, p. 16

Figure 1.9 A guide to problem solving. Fig. 1-9, p. 17

Figure 1.10 (Example 1.11) Fig. 1-10, p. 18

A point in the plane can be described with Cartesian coordinates (x, y) or with the polar coordinates (r, ). p. 19

p. 19

Figure P1.26 Fig. P1-26, p. 22

Figure P1.41 Fig. P1-41, p. 23

Figure P1.43 Fig. P1-43, p. 23

Figure P1.45 Fig. P1-45, p. 23

Figure P1.49 Fig. P1-49, p. 23

Figure P1.63 Fig. P1-63, p. 24