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que l'angle DBN Azimuthal par obfervation.

A

Donc au Triangle ABC deux côtez AC, CB, & l'angle CB A complement de l'angle DBN, étant donnez, on trouvera l'angle BCA, qui eft l'arc IA ou HM; lequel étant divifé par 15 degrez, le quotient fera le nombre des heures requifes.

XXIII. Etant connue la Hauteur & la Declinaifon du Soleil, avec l'angle Azimuthal, trouver

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l'heure & l'Elevation du Pole.

L'arc B A complement de la hauteur du Soleil A N eft donné, A C eft auffi donné, l'angle Azimuthal eft donné ; Donc

auf

Comme le Sinus de l'arc AC,

Eft au Sinus de l'angle ABC,

Ainfi le Sinus de AB

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Eft au Sinus de l'angle ACB, qui est l'arc
IA on HM, pour l'heure requife.

Et pour l'Elevation du Pole, voyez l'Analogie pour trouver le côté BC, complement de la hauteur du Pole CF.

TABLES

DE SINUS,

TANGENTES,

ET

SECANTES,

Pour un Rayon de 10000000 parties.

ET DES

LOGARITHMES

DES SINUS

ET DES TANGENTES,

Pour un Rayon de 10000000000 parties,

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843.57 843.60 100003.55

7.9261190 7.9261344

1

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Tangent Secantes.

Log. Sin. Log Tang.

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53.99999.79 49110600 49110702. 5299999.7342971757 +2971873. S1 99999.66 3819709938197230.

|50 99999.58 34377371 34377516. 4999999.493125213731252297.

4899999.3928647773 28647948.

47 99999.28 26444080. 26444269. |46|99999.17|24555198. 24555402. 45 99999.05 22918166. 22918385.

4499998.92 21485762. 21485995. 4399998.78 20221875 20222122. 42 99998.6319098419.19098680.

41 99998.47 18093220. 18093496. 4099998.3117188540.17188831. 3999998.1316370019. 163703 25.

|38|99997.95 15625908. 15626228. 3799997.76 14946502. 14946837. 35 99997.56 14323712.14324061. 3599997.36 13750745. 13751108. 34 99997.1413221851. 13222229. 3399996.92 12732134. 12732526.

|32|99996.68|12277396.12277803. 31 99996.44 11854018. 11854440. 3099996.19 11458865.11459301.

9.9999999 13.5362739

9.9999999 13.2352438

9.9999998 13.0591525

9.9999997 12.9342137

9.9999995 12. 2.8373036 9.9999993 12.7581222

9.9999991 12.6911752 9.9999988 12.6331831

9.999998512.5820304

9.9999982 12.5362727 9.9999978 12.4948797 9.9999974 12.4570909

9.9999969 12.4223285 9.9999964 12.3901434

|9.9999959|12.3601799

9.9999953 12.3321508 9.9999947 12.3058214 9.9999940 12.2809974

9.9999934 12.2575159 9.9999927 12.2352390

9.999991912.2149492

9.999991112.1938453 9.9999903 12.1745396 9.9999894 13.1560556

9.9999885 12.1383262 9.9999876 12.1212923 9.9999866 12.1049012

9.9999856 12.0891062 9.9999845 12.0738656 19.9999835|12.0591614

Minut.

Sinus Tangent.] Secantes.

Log. Sin. Log. Tang.

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59

1687.07 1687.31 100014.24 1716.16 1716.41 100014.73

8.2271335 8.2271953

8.2345568 8.2346208

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