Approximation

$A_3$

$B_1$

$C_1$

1 term

−1.89052474

1.00059930

0.99995131

2 term

−1.88870911

1.00065724

0.99992738

3 term

−1.88872478

1.00065993

0.99992621

4 term

−1.88872513

1.00065996

0.99992618

5 term

−1.88872513

1.00065996

0.99992618

6 term

−1.88872513

1.00065996

0.99992618

7 term

−1.88872513

1.00065996

0.99992618