half-side formulas

half-side formulas

[′haf ‚sīd ‚fōr·myə·ləz]
(mathematics)
In trigonometry, formulas that express the tangents of one-half of each of the sides of a spherical triangle in terms of its angles.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.