OA |
OB |
5π |
6 |
OA |
OB |
AB |
OA |
(λsinα)2+(λcosα)2 |
OB |
cos2β+sin2β |
OA |
OB |
5π |
6 |
1 |
2 |
OA |
OB |
| ||
-λ×1 |
1 |
2 |
OA |
OB |
2π |
3 |
AB |
OB |
OA |
(cosβ-λsinα)2+(sinβ-λcosα)2 |
1+λ2-2λ(sinαcosβ+cosαsinβ) |
1+λ2-2λsin(α+β) |
1+λ2-λ |
(λ-
|
1 |
2 |
| ||
2 |
7 |
AB |
| ||
2 |
7 |
a |
b |
a |
b |
b |
A.(1,
| B.(
| C.(1,±
| D.(
|
a |
b |
a |
A.30° | B.45° | C.60° | D.90° |
a |
b |
a |
b |
a |
a |
b |
a |
b |
a |
b |
8 |
9 |
A.2 | B.-2 | C.-2或
| D.2或-
|
e1 |
e2 |
a |
e1 |
e2 |
b |
e1 |
e2 |
a |
b |
A.t>-1 且t≠1 | B.t>-1 | C.t<1 且t≠-1 | D.t<1 |
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