Thesaurarium mathematicae, or, The treasury of mathematicks containing variety of usefull practices in arithmetick, geometry, trigonometry, astronomy, geography, navigation and surveying ... to which is annexed a table of 10000 logarithms, log-sines, and log-tangents / by John Taylor.
About this Item
Title
Thesaurarium mathematicae, or, The treasury of mathematicks containing variety of usefull practices in arithmetick, geometry, trigonometry, astronomy, geography, navigation and surveying ... to which is annexed a table of 10000 logarithms, log-sines, and log-tangents / by John Taylor.
Author
Taylor, John, mathematician.
Publication
London :: Printed by J.H. for W. Freeman,
1687.
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Subject terms
Mathematics -- Early works to 1800.
Link to this Item
http://name.umdl.umich.edu/A64224.0001.001
Cite this Item
"Thesaurarium mathematicae, or, The treasury of mathematicks containing variety of usefull practices in arithmetick, geometry, trigonometry, astronomy, geography, navigation and surveying ... to which is annexed a table of 10000 logarithms, log-sines, and log-tangents / by John Taylor." In the digital collection Early English Books Online. https://name.umdl.umich.edu/A64224.0001.001. University of Michigan Library Digital Collections. Accessed June 24, 2025.
Pages
PROP. II. By the Protractor given, to measure an Angle given.
This is performed by the line of Chords also, according to prop. 6. §. 1. chap 4. and by the Protractor is found thus: Suppose DCB were an Angle whose Quantity were desired, to find which, first the Center of the Protractor applyed* 1.1 unto the Angular point C, and its Meridional line lying justly with CB; you shall perceive the Point D, to touch the limb of the Circle at 50 deg. Therefore I conclude the Measure of the Angle DCB, to be 50 degrees.