Libros Libros 71 - 80 de 101 sobre AC, (Fig. 25.) is to their difference ; as the tangent of half the sum of the angles... AC, (Fig. 25.) is to their difference ; as the tangent of half the sum of the angles ACB and ABC, to the tangent of half their difference. Elements of Plane and Spherical Trigonometry: With Their Applications to ... - Página 18
por Olinthus Gregory - 1816 - 244 páginas
Vista completa - Acerca de este libro ## The Elements of Plane Trigonometry

James Hann - 1854 - 119 páginas
...+ b tan By Art. 19, —jjHence the following rule : As the sum of any two sides of a plane triangle is to their difference, so is the tangent of half the sum of their opposite angles to the tangent of half their difference. By Art. 16, .-. a2 - o2 = c2 - 2bc cos...
Vista completa - Acerca de este libro ## Report of twenty-one years' experience of the Dick bequest for elevating the ...

Allan Menzies - 1854
...be given, then rule is, — Sum of the two sides (containing given angle) is to their difference as the tangent of half the sum of the angles at the base is to the tangent of half their difference ; half the sum = ^ (180 — angle C), then having found...
Vista completa - Acerca de este libro ## A compendious course of mathematics, theoretical and practical

...and this proportion expressed in words is the following rule. RULE. As the sum of the two given sides is to their difference, so is the tangent of half the sum of the opposite angles to the tangent of half their difference. that is 0-6 (1) Two sides of a triangle are...
Vista completa - Acerca de este libro ## Orr's Circle of the Sciences: Practical astronomy, navigation, nautical ...

William Somerville Orr - 1856
...difference. The following, therefore, is the rule :— ROLE. — As the sum of the two given sidee Is to their difference, So is the tangent of half the sum of the opposite angles To the tangent of half their difference. The half difference of the unknown angles...
Vista completa - Acerca de este libro ## Practical carpentry, joinery, and cabinet-making [by P. Nicholson. by P ...

Peter Nicholson - 1856
...TRIGONOMETRY. — THEOREM 2. 151. The sum of the two sides of a triangle is to their difference as the tangent of half the sum of the angles at the base is to the tangent of half their difference. Let ABC be a triangle 4 then, of the two sides, CA and...
Vista completa - Acerca de este libro ## The practice of engineering field work, applied to land, hydrographic, and ...

W. Davis Haskoll - 1858 - 324 páginas
...When the three given parts are two sides and the included angle. — As the sum of the two given sides is to their difference, so is the tangent of half the sum of the opposite angles to the tangent of half their difference. In the triangle ABC, AB = 345, and BC = 174,...
Vista completa - Acerca de este libro ## Euclid's Elements of plane geometry [book 1-6] explicitly enunciated, by J ...

Euclides - 1860
...of half their difference. 13. The base of a triangle is to the difference of its sides, as the sine of half the sum of the angles at the base to the sine of half their difference. 14. The base of a triangle is to the difference of its segments, as...
Vista completa - Acerca de este libro ## Practical military surveying and sketching

Alfred Wilks Drayson - 1861 - 192 páginas
...proceed as follows : — Suppose AB, BC, known, and the angle ABC. Then as the sum of the two sides Is to their difference, So is the tangent of half the sum of the two unknown angles To the tangent of half their difference. Half their difference thus found, added...
Vista completa - Acerca de este libro ## Examination papers used at the examinations for direct commissions [&c.].

War office - 1861 - 12 páginas
...triangle, calling one side the base, prove that the sum of the other two sides is to their difference as the tangent of half the sum of the angles at the base is to the tangent of half their difference. 6. Observers on two ships a mile apart find the angles...
Vista completa - Acerca de este libro 