Section 13.3 Worksheet:

Assigned problems: Exercises pp. 836-837, #1, 4, 5, 7, 16, 18, 20, 23, 24, 29, 31, 39, 42, 51, 52 (due Wednesday, 11/5).

1. What do you get when you take a dot product? What is the result of the operation?

2. What are direction cosines?

3. Describe in geometric terms how two vectors are orthogonal (that is, perpendicular), and then suggest a test for orthogonality.

4. How do the vector projection of b onto a and the scalar projection of b onto a differ?