Object Details
- Illinois Tool Works Inc.
- Description
- 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.
- Location
- Currently not on view
- Credit Line
- Gift of Elton L. Howe
- 1969
- ID Number
- 1989.3123.02
- catalog number
- 1989.3123.02
- nonaccession number
- 1989.3123
- Object Name
- pamphlet
- Physical Description
- paper (overall material)
- Measurements
- overall: .5 cm x 7.5 cm x 16.5 cm; 3/16 in x 2 15/16 in x 6 1/2 in
- place made
- United States: Illinois, Chicago
- See more items in
- Medicine and Science: Mathematics
- Trigonometry
- Science & Mathematics
- National Museum of American History
- Subject
- Mathematics
- Record ID
- nmah_1802753
- GUID (Link to Original Record)
- https://n2t.net/ark:/65665/ng49ca746b2-4348-704b-e053-15f76fa0b4fa
