Seven-Figure Trigonometrical Tables for Every Second of Time


COMPUTERS are well aware of the difficulties experienced in dealing with right ascension, hour angle, etc., in astronomical work, when trigonometrical functions of these are required. It is necessary to convert them into degrees, minutes and seconds of arc before tables of trigonometrical functions can be used, and tables with the argument in time have been in demand for many years. The present volume supplies a need and is the first seven-figure table to be published which gives the four natural trigonometrical functions chiefly used in astronomy and related sciences, intervals of one second of time being used throughout.

Seven-Figure Trigonometrical Tables for Every Second of Time

Prepared by H.M. Nautical. Almanac Office. (Published by order of the Lords Commissioners of the Admiralty.) Pp. 102. (London: H.M. Stationery Office, 1939.) 10s. 6d. net.

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D., M. Seven-Figure Trigonometrical Tables for Every Second of Time. Nature 145, 482–483 (1940).

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