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Trigonometry Tables Published by Illinois Tool Works

Trigonometry Tables Published by Illinois Tool Works

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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. Also shown are precision metal cutting tools and Shakeproof screws, washers, and fasteners.
The pamphlet was owned by machinist and museum specialist George A. Norton. A mark on the first page inside the cover reads: WWII. This suggests the date.
Compare 1986.3078.02.
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 7.8 cm x 16.5 cm; 3/16 in x 3 1/16 in x 6 1/2 in
ID Number
nonaccession number
catalog number
Credit Line
Gift of George A. Norton
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Data Source
National Museum of American History
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