Legendre, A. M. (Adrien Marie), 1752-1833, Brewster, David, Sir, 1781-1868, Davies, Charles, 1798-1876 · New York, Wiley & Long · leaf 214
he sum of either two angles, is always positive. GENERAL IDEAS RELATING TO TRIGONOMETRICAL LINES. V. The sine of an arc isthe perpendicular let fall fromone extremity of the arc, onthe diameter which passesthrough the otiier extremity.Thus, MP is the sine of thearc AM, or of the angle ACM. The… … PLANE TUlGOxNOMKTRV. 215 The secant of an arc is tlic line drawn froin the centre ofllie circJe through one extremity of th«i arc ami hniiled by thetan;;ent drawn throuf^h tlie other extreniitv. Thus CT is thesecant of the arc AM, or of tlie angle ACM. The versed sine of an arc, is the j)art of the…
Trigonometry · Geometry
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