題目列表(包括答案和解析)
A.60° B.30° C.75° D.45°
設(shè)向量a=,向量b=,且a∥b,則銳角θ為( ).
A.60° B.30° C.75° D.45°
a |
3 |
2 |
b |
1 |
3 |
a |
b |
A.60° | B.30° | C.75° | D.45° |
a |
3 |
2 |
b |
1 |
3 |
a |
b |
A.60° | B.30° | C.75° | D.45° |
A.60° | B.30° | C.75° | D.45° |
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