 | Simon Newcomb - Trigonometry - 1882 - 372 pages
...27' = 0.06900; ence between every two consecutive logarithms, in order to facilitate interpolation. 1 In the case of tangent and cotangent, only one column...proportional parts are given in the margin, the use of .which is similar to those given with the logarithms of numbers. Example 1. To find the log sin... | |
 | Edward Albert Bowser - Logarithms - 1895 - 124 pages
...and those of the logarithmic tangents and cotangents in the columns, headed cd (common difference'). In the case of tangent and cotangent, only one column of differences is necessary for both functions. Ex. 1. To find log sin 18° 25' 35". Page £6, log sin 18° 25' = 9.49958. Tabular difference = 38.... | |
 | Edward Albert Bowser - Logarithms - 1908 - 128 pages
...and those of the logarithmic tangents and cotangents in the columns headed cd (common difference). In the case of tangent and cotangent, only one column of differences is necessary for both functions. Ex. 1. To find log sin 18° 25' 35". Page 56, log sin 18° 25' = 9.49958. Tabular difference = 38.... | |
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In the case of tangent and cotangent, only one column of differences is necessary for both functions. If we use no fractional parts of minutes, no interpolation is necessary; but if decimals of a minute are employed, we can interpolate precisely as in... 