Mechanical and marine engineering science ... Specially written as a handbook to the Board of Trade examinations for extra-first-class engineers (1909)
Somerscales, A. N · Glasgow : J. Munro; London, Simpkin, Marshall, Hamilton, Kent · leaf 334
he ratio of AT to the radius. ATthat is -^— and this becomesCA tangent perbase .(2). CT Also the secant is the ratio of CT to the radius, that is —^ or secant = base •(3)- Modern works on Trigo-nometry commence by givingequations (i), (2), (3) as thedefinitions of the sine, tangent,and secant of an… … For instance:— CS being equal to EB is also the cosine of ACB, and SA,which is called the versed sine, = CA - CS, that is (CA being unity) ,_332 THE TRIGONOMETRICAL RATIOS AND ANGULAR MEASURES. Versine = i - cosine (4). Similarly co-versine = i - sine (5). Again, B S^ + C S^ = C B^ = i^ which is…
Naval architecture
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