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).
The Inverse trig. functions are discussed further on the Wikipedia Inverse Trigonometric Functions Page Function Description The Excel ATAN function calculates the arctangent (i.e. the inverse tangent) of a given number, and returns an angle, in radians, between -Ï/2 and +Ï/2. The syntax of the function is: ATAN( number)