The inverse haversine function is defined by

(1)

The inverse haversine is implemented in Mathematica as InverseHaversine[z].

It has derivative

(2)

and indefinite integral

(3)

where is a constant of integration.

The inverse haversine has the series expansion

			(4)
			(5)

(Sloane's A143581 and A143582).

Sloane, N. J. A. Sequences A143581 and A143582 in "The On-Line Encyclopedia of Integer Sequences."

CITE THIS AS:

Weisstein, Eric W. "Inverse Haversine." From MathWorld--A Wolfram Web Resource. http://mathworld.wolfram.com/InverseHaversine.html