# Mathematics 1B

**12. session**
Tuesday 27. October 2009

Auditorium X1.80

### Program

- 09:00-10:20
- Lecture on E&P Section 11.2,
Three-Dimensional Vectors, page 829-832.
- 10:20-10:45
- Introduction to the exercises.
- 10:45-12:30
- Exercises in groups.

### Exercises

- Section 11.2, page 833
- Problems no. 1, 5, 19, 21, 25, 29, 31.
- The rest of the exercises from 11. session.

### Illustration

The dot product applet
illustrates the geometric interpretation of the dot product

**a**•**b** = |**a**||**b**|cos(θ)

where θ is the angle between the vectors **a** and **b**.

Latest update 26. October 2009 by Iver Ottosen