An Elementary Treatise on Plane Trigonometry

Description:

Book digitized by Google from the library of Harvard University and uploaded to the Internet Archive by user tpb.

subjects: sin,  cos,  tan,  angle,  log,  angles,  cot,  prove,  triangle,  trigonometrical,  trigonometrical ratios,  circular measure,  angle subtended,  find sin,  trigonometrical ratio,  triangle abc,  horizontal plane,  middle point,  inscribed circle,  find cos