A treatise on plane and spherical trigonometry

1+cos a+b+c ABDE analytical arithmetical Astron Astronomy chord circle circumference co-sec co-tan compute the sines consequently cos.² cos.³ cos.c cubic equations deduced degrees determined difference equal equation Euclid Example formula fraction given Hence instance latter loga logarithmic tangents logarithms means multiple arcs Naper's oblique-angled triangles obtained plane Prob PROBLEM Prop Proposition quadrant quantity radius rectilinear triangles required to express result right angle root rule secant Sherwin's Tables shew sides similar triangles similarly simple arc sin.² sin.³ sin.c sine sine and cosine sines of arcs spherical angle spherical triangle Spherical Trigonometry substitute subtract supplemental triangle terms involving Theorem Trigonometrical formulæ Trigonometrical Tables versed sine versin