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" B . sin c = sin b . sin C cos a = cos b . cos c + sin b . sin c cos b = cos a . cos c + sin a . sin c cos A cos B cos c = cos a . cos b + sin a . sin b . cos C ..2), cotg b . sin c = cos G. "
Popular and Mathematical Astronomy, with the principal formulæ of Plane and ... - Page 87
by William Thomas Read - 1862
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The Elements of the Theory of Astronomy

John Hymers - Astronomy - 1840 - 386 pages
...SPK = cos /, and applying these values and the fundamental formulas of spherical Trigonometry, viz. cos c = cos a cos b + sin a sin b cos C, cot .4 sin C = cot a sin 6 — cos C cos 6, sin a sin B = sin .4 sin b, (where «, 6, c, A, S, C, represent...
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Higher Geometry and Trigonometry: Being the Third Part of a Series on ...

Nathan Scholfield - Conic sections - 1845 - 244 pages
...cos. b cos. c . (*•) cos. A = And, cos. C = sin. b sin. c cos. c — cos-, a cos. b sin. a sin. b cos. c = cos. a cos. b + sin. a sin. b cos. C (2-) Substituting this value of cos. c in Equation (1.) : cos. a — cos. a cos.' b — cos. b sin....
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Elements of plane (solid) geometry (Higher geometry) and trigonometry (and ...

Nathan Scholfield - 1845 - 894 pages
...cos. a — cos. 6 cos. c cos. A = And, cos. C = sin. b sin. c cos. c — cos. a cos. b sin. a sin. b cos. c = cos. a cos. b + sin. a sin. b cos. C (1.) . . . (2.) Substituting this value of cos. c in Equation (1.) : cos. a — cos. a cos.' b —...
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A Series on Elementary and Higher Geometry, Trigonometry, and Mensuration ...

Nathan Scholfield - Conic sections - 1845 - 542 pages
...cos. a — cos. b cos. c . . • • " • • • •* (•*•) cos. A = And, cos. C = sin. b sin. c cos. c — cos. a cos. b sin. a sin. b .'. cos. c — cos. a cos. i + sin. a sin. b cos. C - - - (2.) Substituting this value of cos. c in Equation (1.)...
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An Elementary Treatise of Spherical Geometry and Trigonometry

Anthony Dumond Stanley - Geometry - 1848 - 134 pages
...: thus, (1) cos a = cos b cos c + sin b sin c cos A (2) cos b = cos a cos c + sin a sin c cos B (8) cos c = cos a cos b + sin a sin b cos C. and as the three equations at the end of the last article together contain all the six parts of a triangle,...
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Lehrbuch der sphärischen Astronomie

Franz Brünnow - Astronomy - 1851 - 634 pages
...Fälle umfasst: cos a = cos b cos c + sin b sin c cos A cos b = cos o cos c + sin o sin c cos B {1) cos c = cos a cos b + sin a sin b cos C sin a sm U — sin b sin . l EID a sin C' — sin c sin .1 (3) sin 6 sin C = sin c sin /•' sin o...
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Encyclopédie moderne: Dictionnaire abrégé des sciences, des ..., Volume 16

Encyclopedias and dictionaries - 1852 - 446 pages
...les côlés a', b', c, du triangle sphérique semblable tracé à sa surface , donnent l'équation cos c'= cos a' cos b' + sin a' sin b' cos C ; mais les arcs semblables a et a' donnent, en développant , R étant le rayon de la terre. Il faut...
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Elementary Treatise on Astronomy

William Augustus Norton - Astronomy - 1852 - 522 pages
...a sin b sin c or, the sines of the angles are proportional to the sines of the opposite sides. 74. cos c = cos a cos b + sin a sin b cos C 75. cos c = cos (a — b) — 2 sin a sin b sin" £C 76. cos C = sin A sin B cos c — cos A cos B...
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Traite Elementaire De Trigonometrie Rectiligne Et Spherique Et D'Application ...

Silvestre François Lacroix - Geometry, Analytic - 1852 - 354 pages
...qui sont : cos A = — cos B cos C + sin B sin C cos a cos B = — cos A cos C -f- sin A sin C cos b cos C = — cos A cos B + sin A sin B cos c cos A -+- cos B cos C cos b = cos c = sin B sin C cos B -+- cos A cos C sin A sin C cos C -+- cos A...
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Elements de géométrie et de trigonométrie, á l'usage des candidats aux ...

M. E. Gouré - Geometry - 1852 - 644 pages
...donc facilement les deux angles A et B. Pour trouver le côté c, on se servira de la formule (n° 75) cos c = cos a cos b -+- sin a sin b cos C. Mais , pour rendre cette expression calculable par logarithmes, il faudra poser sin b cosC — : -,...
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