## Trigonometry: Plane and Spherical; with the Construction and Application of Logarithms. By Thomas Simpson, F.R.S. |

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added alfo alſo appears arch bafe baſe becauſe cafe called chord circle co-f co-fine AC co-tang common complement COROL COROLLARY determine diameter drawn Edition equal equal to half evident excefs extremes fame fecant feries fhall fides AC fimilar fince fine fines firſt follows fubtracted fuppofed given gives gles great-circles greater half the difference half the fum Hence hyperbolic logarithm hypothenufe known laft manifeft meeting method minute moreover multiplied Note oppofite parallel perpendicular plane triangle ABC preceding progreffion PROP propofed proportion radius rectangle remainder right-angled spherical triangle ſhall spherical triangle ABC tang tangent of half Theor THEOREM thereof thofe unity verfed vertical angle whence whofe