$n_x=n_y$

10

30

50

70

90

$Erro{r}_f$

2.88E−3

3.24E−4

1.16E−4

5.95E−5

3.59E−5

$Erro{r}_s$

1.37E−4

1.64E−6

2.33E−7

6.50E−8

2.49E−08