Spherical Trigonometry, for the Use of Colleges and Schools: With Numerous ExamplesMacmillan, 1863 - 132 страница |
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A+B+C angular points AP coincides approximately calculated centre circle inscribed circular measure cos A cos cos² cos³ cosec cosine cotangent deduce denote equal equation error example expression figure formed formula four right angles given angle given log greater h cot Hence inscribed circle less logarithmic sine Napier's negative number of degrees observed obtain opposite angle opposite sides perpendicular polar triangle pole polygon polyhedron preceding article prove quadrant radius regular polygon regular polyhedron respectively right-angled triangle secant shew shewn Similarly sin A sin sin² sin³ sine solid angle solution sphere spherical excess spherical triangle subtend suppose Table tabular logarithmic tan² tan³ tangent theorem triangle ABC Trigonometrical Functions Trigonometrical Ratios unity