Description
1. (10 pts) (1.3.27).
2. (5 pts) Let �u = (1, −1, 2), �v = (2, 1, 1), and w� = (0, 2, −1). Is the
triple �u, �v, w� a right-hand set or a left-handed set? Why?
3. (15 pts) (a) Let
cos θ sin θ A = A(θ) = , − sin θ cos θ
and let f : R2 −→ R2 be the function which sends the vector �v = (x, y)
to the vector w� = f(�v) = A�v. Show that w� = f(�v) is the vector �v
rotated around the origin through an angle of θ, so that the function
f represents rotation around the origin through an angle of θ.
(b) Show, by direct computation, that if B = A(θ) and C = A(φ), then
BC = A(θ + φ).
(c) Explain why (b) holds.
4. (5 pts) (1.4.6).
5. (5 pts) (1.4.11).
6. (5 pts) (1.4.18).
7. (8 pts) (1.4.26).
8. (5pts) (1.5.7)
9. (5 pts) (1.5.8).
10. (5 pts) (1.5.9).
11. (5 pts) (1.5.12).
12. (5 pts) (1.5.20).
13. (5 pts) (1.5.24).
14. (5 pts) (1.5.28).
15. (5 pts) (1.6.9).
16. (5 pts) (1.6.11).
17. (5 pts) (1.6.14).
18. (5 pts) (1.6.21).
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