Unix in a Nutshell, 4th Edition

Built-in Mathematical Functions (ksh93 Only)

ksh93 provides access to the standard set of mathematical functions. They are called using C function call syntax.

Name	Function	Name	Function
abs	Absolute value	hypot	Euclidean distance
acos	Arc cosine	int	Integer part of floating-point number
asin	Arc sine	log	Natural logarithm
atan	Arc tangent	pow	Exponentiation (x y)
atan2	Arc tangent of two values	sin	Sine
cos	Cosine	sinh	Hyperbolic sine
cosh	Hyperbolic cosine	sqrt	Square root
exp	Exponential (e x)	tan	Tangent
fmod	Floating-point remainder	tanh	Hyperbolic tangent