A, 4 cos 6 = cos c cos a + sin c sin a cos B, > (1) . , "cos c = cos a cos b + sin a sin b cos C. J Whence . cos a — cos b... Anleitung zu rechnungen der geodäsie - Page 10 by Friedrich Theodor Poselger - 1831 - 57 pages Full view - About this book
...(A + B) = cos A cos B - sin A sin B. tan(45' + 3. In any plain triangle 4. In any spherical triangle cos a = cos b cos c + cos A sin b sin c. Section IV. 1. At what rate is a place in 45° N. latitude carried per hour by the diurnal revolution...