Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 285
he radius of thecircle. In the figure a b is equal to the radius;ac, ad, and a e are respectively two, three, andfour times as great as the radius. By referringto the table of tangents, page 263. we may seethat if the tangent of a o b is 1, the angle mustbe 45°; the tangent of a o c being two, the… … Fig. 170.—Tangentgalvanometer.
Physics
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