Schmall, Charles Nelson. [from old catalog] · New York, D. Van Nostrand company · leaf 39
D B G Fig. 26. parallel to DE. 6 and 0 are the angles required. By Trigonometry,sin ^ : sin 0 : : BD : BE. 8. So that their tangents may have a given ratio. Take any two linesAD, DB in the given ratio. On AB describe a segment to contain an C y \ \ / y1 y^ ^~ V 1 y^ 1 y \ \ A D B Fig. 27.angle… … Take BE : BD in given ratio.DrawBLJ-DE. 6 and 0 are the required angles. * The following exercises 7-11 will he found useful sometimes indoing more difficult ones. CO-ORDINATES. THE POINT 23 10. To construct a line equal to the square root of a given line. AB is the given line, whose length ia…
Geometry, Analytic
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