Spherical Trigonometry: For the Use of Colleges and Schools

angle of intersection angular points approximately arcs drawn arcs which join b₁ bisecting centre CHAPTER circles touch coincide colunar triangle constant corresponding cos a cos cos TU cos² cosec cosines deduce DELAMBRE's analogies denote elements equal equation example expression fixed points formulae Geometry given greater Hence inscribed circle length less mutual power obtained octahedron opposite sides orthogonal parallelepiped perpendicular plane angles Plane Geometry plane triangle Plane Trigonometry polar triangle pole polygon preceding Article produced quadrant r₁ r₂ radii radius reciprocal regular polyhedron relation respectively result right angles right-angled triangles shew sin b sin sin c cos sin² sine small circle solid angles solution sphere spherical excess spherical tangents spherical triangle spherical triangle ABC Spherical Trigonometry substitution suppose surface