Trigonometry, Plane and Spherical: With the Construction and Application of LogarithmsJ. Nourse, 1765 - 79 sider |
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AC by Theor AC-BC AC+ BC adjacent angle alfo known alſo arch baſe becauſe bifecting bypotbenufe cafe chord circle co-fecant co-fine AC co-tangent of half common logarithm confequently diameter dius E. D. PROP equal to half excefs faid fame fecant fecond feries fhall fides AC fimilar fince fines firft firſt fpherical triangle fquare fubtracted fupplement fuppofed garithms gles great-circles half the bafe half the difference half the fum half the vertical Hence hyperbolic logarithm hypothenufe interfect laft leffer leg BC likewife manifeft moreover oppofite angle pendicular perpendicular plane triangle ABC progreffion propofed propofition proportion radius rectangle refpectively right-line ſhall Spherical triangle ABC tang tangent of half themſelves THEOREM theſe thofe Trigonometry verfed vertical angle whence whofe x co-f