| X | Approximate | Exact | Error |
| 0.1 | −0.9003239011700949 | −0.9003324014015763 | 8.50023 × 10−6 |
| 0.2 | −0.8026198749681477 | −0.8026250641923195 | 5.18922 × 10−6 |
| 0.3 | −0.7086831923373599 | −0.7086877536032365 | 4.56127 × 10−6 |
| 0.4 | −0.6200481204620889 | −0.6200513800003417 | 3.25954 × 10−6 |
| 0.5 | −0.5378805844147091 | −0.5378831573191416 | 2.5729 × 10−6 |
| 0.6 | −0.4629488207007662 | −0.4629507176331309 | 1.89693 × 10−6 |
| 0.7 | −0.3956310142120661 | −0.39563247677873387 | 1.46257 × 10−6 |
| 0.8 | −0.33596238431652836 | −0.3359634533542775 | 1.06904 × 10−6 |
| 0.9 | −0.28370142511481006 | −0.28370232456797584 | 8.9945 × 10−7 |
| 1 | −0.23840584404423507 | 0.23840601203402295 | 1.67989 × 10−7 |