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Pamphlet, Trigonometry Tables and Involute Functions

Pamphlet, Trigonometry Tables and Involute Functions

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In the mid-twentieth century, American tool manufacturers sometimes distributed trigonometry tables that included advertisements for their products. This small paper pamphlet includes definitions of the sine, cosine, tangent, cotangent, secant, and cosecant as well as formulas for finding the length of sides for right-angled and oblique triangles when different angles and sides are known. It then gives tables to five places of values of the six trigonometric functions mentioned, as well as a table of decimal equivalents. In addition to this material, the pamphlet has a section on involute functions that includes tables and formulas for spur and helical gears.
Also shown are precision metal cutting tools manufactured by Illinois Tool and Instrument, a division of Illinois Tool Works, Inc.
Currently not on view
Object Name
date made
Illinois Tool Works Inc.
place made
United States: Illinois, Chicago
Physical Description
paper (overall material)
overall:.5 cm x 7.5 cm x 16.5 cm; 3/16 in x 2 15/16 in x 6 1/2 in
ID Number
catalog number
nonaccession number
Credit Line
Gift of Elton L. Howe
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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