containing tables of logarithms for numbers, sines, and tangents. With the manifold use thereof briefly explained and applied in arithmetick, geometry, astronomy, geography, surveying, navigation, dialling, gunnery, and gauging Henry ... Now in this Triangle P Z being 38 deg. ... But to make this somewhat shorter, and to do it at two Operations, wirnout finding the length of the Perpendicular Z R, work thus.
|Title||:||A mathematical manual|