l

10˚

15˚

18˚

20˚

24˚

弧长

177,825

355,649

592,749

889,123

1,066,947

1,185,497

1,422,596

坐标值

177,907

356,309

595,818

899,584

1,085,168

1,210,645

1,466,684

绝对误差

82

660

3069

10,461

18,221

25,148

44,088

相对误差

4.6 × 104

1.8 × 103

5.1 × 103

1.1 × 102

1.7 × 102

2.1 × 102

3.1 × 102