Elements of Plane and Spherical Trigonometry: With Practical Applications

A B C acute angle angle equal angle opposite angle or arc APPLICATIONS arithmetical base called characteristic circle complement corresponding cos² cosec Cosine Cotang decimal denoted determined difference distance divided draw equation EXAMPLES expressed feet figure formed formulæ Geom given gives greater half the sum height Hence horizontal hypothenuse included angle known latitude less log cos log cot log sin logarithmic sine manner means measured middle minus the logarithmic minutes Napier's rules negative object oblique oblique-angled spherical triangle observed obtain opposite opposite side perpendicular positive Prop quadrants Required respectively result right-angled triangle rods secant side sides equal sin A cos sin a sin sin² Solution solve the triangle spherical triangle Substituting subtract taken Tang tangent tangent of half triangle equal trigonometric functions values whence yards