the radius gives the versed sine. If the given degrees are more than 90°, the sum of the sine complement and the radius give the versed sine. To open the legs of the sector, so that the corresponding double scales of lines, chords, sines, and tangents may make each a right angle. On the lines. Make the lateral distance 10 a distance between eight on one leg and six on the other leg. On the sines. Make the lateral distance 90 a transverse distance from 45 to 45, or from 40 to 50, or from 30 to 60, or from the sine of any number of degrees to their comple ment. Or on the sines. Make the lateral distance of 45, or transverse distance between 30 and 30. |