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A treatise on special or elementary geometry (1877)
Olney, Edward, 1827-1887, Olney, Edward, 1827-1887. Elements of trigonometry, plane and spherical · New York : Sheldon · leaf 423
Fig. 33. 3. Given B = 70^ 4. Given B = 6-4°, … Fig. 34. T0°, to project the triangle. See Fig. 35.75°, to project the triangle. See Fig. 36.Geometry · Trigonometry
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
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