试题与答案

在直角坐标系中,画出下列向量:(1)|a|=2,a的方向与x轴正方向的夹角为60

题型:解答题

题目:

在直角坐标系中,画出下列向量:
(1)|
a
|=2
a
的方向与x轴正方向的夹角为60°,与y轴正方向的夹角为30°;
(2)|
a
|=4
a
的方向与x轴正方向的夹角为30°,与y轴正方向的夹角为120°;
(3)|
a
|=4
2
a
的方向与x轴正方向的夹角为135°,与y轴正方向的夹角为135°.

答案:

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