Visit French Lick West Baden, Indiana for a premier resort experience. A premier resort experience.
The development of modern trigonometry shifted during the western Age of Enlightenment, beginning with 17th-century mathematics (Isaac Newton and James Stirling) and reaching its modern form with Leonhard Euler (1748).
1 Trig functions take arguments in radians, so latitude, longitude, and bearings in degrees (either decimal or degrees/minutes/seconds) need to be converted to radians, rad = Ï.deg/180. 2  When converting radians back to degrees (deg = 180.rad/Ï), West is negative if using signed decimal degrees.