Pamphlet, Trigonometry Tables and Involute Functions
date: label: date made
content: 1969
name: label: maker
content: Illinois Tool Works Inc.
notes: label: Description
content: 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.
label: Description
content: Also shown are precision metal cutting tools manufactured by Illinois Tool and Instrument, a division of Illinois Tool Works, Inc.
label: Location
content: Currently not on view
place: label: place made
content: United States: Illinois, Chicago
topic: label: Subject
content: Mathematics
setName: label: See more items in
content: Medicine and Science: Mathematics
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content: Trigonometry
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content: Science & Mathematics
creditLine: label: Credit Line
content: Gift of Elton L. Howe
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1989.3123.02
label: catalog number
content: 1989.3123.02
label: nonaccession number
content: 1989.3123
objectType: label: Object Name
content: pamphlet
physicalDescription: label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: .5 cm x 7.5 cm x 16.5 cm; 3/16 in x 2 15/16 in x 6 1/2 in