Page 60Scan 30 of 87
(drawing)
Taking results of p 59 of side AB
Calculation numbers 1 to 4
& solving Δ ABC by law of tangents:
| 1) | 2) | 3) | 4) | |||
| ∠ A+C/2 | 34° 57 | 34° 52 1/2 | ” 3) | ” 4) | ||
| a - c | 54.37 | 55.01 | 54.39 | 54.78 | ||
| a + c | 243.07 | 242.43 | 243.15 | 242.66 | ||
| Log Tan + | 9.84442 | 9.84320⁺ | 984320⁺ | 984320⁺ | ||
| " a - c + | 1.73536 | 1.74044 | 1.73552 | 1.73862 | ||
| a + c - | 2.38573 | 2.38459 | 2.38587 | 2.38500 | ||
| " Tan A-C/2 | 9.19405 | 9.19905⁺ | 9.19285⁺ | 9.19682⁺ | ||
| A-C/2 | 8° 53' 7" | 8°. 59. 12" | 8°. 51. 41" | 8. 56. 29" | ||
| Log Sin " | 9.18881 | 9.19369 | 9.18765 | 9.19152 | ||
| " " A+c/2 + | 9.75805 | 9.75724 | 9.75724 | 9.75724 | ||
| 0.56924 | 0.56355 | 0.56959 | 0.56572 | |||
| " a-c + | 1.73536 | 1.74044 | 1.73552 | 1.73862 | ||
| 2.30460 | 2.30399 | 2.30511 | 2.30434 | |||
| side A-C | 201.65 | 201.37 | 201.89 | 201.53 | ||
| A+C/2 | 34.57.0 | 34.52.30 | 34.52.30 | 34.52.30 | ||
| A-C/2 | 8.53.7 | 8.59.12 | 8.51.41 | 8.56.29 | ||
| ∠ A ² (43.47) | 43.50.7 | 43.51.42 | 43.44.11 | 43. 48. 59 | ||
| ∠ C (26.2) | 26. 3. 53 | 25.53.18 | 26. 0.49 | 25 56 1 | ||
| ∴ | ||||||
| ∠ DAC (25.53) | 25.53 | 25.51. | 25.50 | 25.54 | ||
| ∠ DCA (105.20) | 105.20 | 105.31 | 105.23 | 105.19 | ||
| CD (48.47) | 48.47 | 48.38 | 48.47 | 48.47 | ||
| 180.0.0 | 180 0 |
Right page
65 figures hard to readstruck struck outadded written in above” jug ditto, and what it repeatsword reading not certain
