θ |
2 |
3 |
5 |
θ |
2 |
4 |
5 |
A.24x-7y=0 | B.24x+7y=0 | C.7x+24y=0 | D.7x-24y=0 |
θ |
2 |
4 |
3 |
2×
| ||
1-(
|
24 |
7 |
A.30° | B.-30° | C.630° | D.-630° |
A.关于坐标原点对称 | B.关于x轴对称 |
C.关于y轴对称 | D.关于直线y=x对称 |
sinα |
cosβ |
tanα |
tanβ |
1 |
cosαsinβ |
2π |
3 |
2π |
3 |
A.
| B.
| C.
| D.
|
A.70° | B.110° | C.250° | D.290° |
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