Spherical Trigonometry: For the Use of Colleges and Schools

A+B+C ambiguity angle of intersection angular points arcs drawn arcs which join B₁ bisecting centre Chapter circle inscribed circumcircle circumference coincide colunar triangle cos a cos cos² cos2b cosc cosine deduce DELAMBRE'S analogies denote determined elements equal equation example expression formulae of Art Geometry given greater Hence inscribed circle less Let ABC logarithms Ltan lune meet mid points NAPIER'S analogies NAPIER'S Rules obtained opposite sides perpendicular Plane Geometry plane triangle polar triangle pole positive preceding Article quadrant r₁ r₂ radii radius regular polyhedron respectively result right angles right-angled triangles shew shewn sides and angles Similarly sin b sin sin c cos sin² sine small circle solid angle solution Sphärik sphere spherical excess spherical polygon spherical triangle Spherical Trigonometry substitution suppose surface tetrahedron theorem triangle ABC