Spherical Trigonometry, for the Use of Colleges and Schools: With Numerous Examples |
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Common terms and phrases
A+B+C ambiguity angular points approximately arcs drawn arcs which join bisecting centre circular measure cos b cos COS TU cos² cos³ cosb cosc cosines cot a sin Crown 8vo deduce denote equation equilateral escribed circles example expression faces fixed points formed formula formulæ formulæ of Art greater Hence inscribed less Let ABC lune meet middle point Napier's analogies Napier's Rules obtain opposite sides parallelepiped perpendicular plane triangle Plane Trigonometry polar triangle pole polygon position preceding Article quadrant r₁ regular polyhedron respectively result right angles right-angled triangles shew shewn Similarly sin b sin sin C cos sin² sin³ sine small circle described solid angles solution sphere spherical excess spherical triangle Spherical Trigonometry straight lines subtended suppose surface tangent tetrahedron µ³