A Treatise on Plane and Spherical Trigonometry

A+B+C altitude angle opposite angles or arcs angular arc-sin arc-tan azimuth celestial sphere centre circumscribed colog compute cos b cos cos b sin cos² cosb cosc cosec cosines cotangent coversed-sine determine diameter dividing ecliptic equations equinoctial escribed circles Find the angles Find the area Find the side Find the value formulæ horizon hypothenuse inscribed isosceles triangle latitude less than 90 Let ABC Fig log a log log cot logarithmic longitude Napier's Analogies oblique triangle obtain perpendicular plane triangle pole quadrant radii ratio regular polygon right angle right ascension secant Show sin B sin sin C cos sin(A+B sin(sb sin² sin³ sinb sinc sines and cosines sins sin(s solution Solve the triangle spherical right triangle spherical triangle SPHERICAL TRIGONOMETRY star tanc tangent three angles three sides triangle ABC trigonometric functions vernal equinox vertices zenith