Spherical Trigonometry for the use of colleges and schools. With numerous examples |
Other editions - View all
Common terms and phrases
A'BC a+b+c ambiguity angle BAC angular points approximately bisecting calculated centre circular measure cos b cos cos² cosine cot a sin deduce denote drawn equal angles equation error example expressed figure formulæ of Art given triangle greater Hence hypothenuse inscribed Legendre's Theorem less Let ABC lune middle point Napier's analogies Napier's Rules observed obtained octahedron opposite angle opposite sides parallelopiped perpendicular plane triangle Plane Trigonometry polar triangle pole polygon preceding article primitive triangle produced prove quadrant r₁ regular polyhedron respectively right angles right-angled triangles SB and SC shew shewn sides and angles Similarly sin b cos sin b sin sin² sin³ sine small circle described solid angle solution spherical excess spherical triangle Spherical Trigonometry ß³ subtended supplement suppose surface tangent tetrahedron values π π