HP 40G manual Real-number functions

Real-number functions

	Some real-number functions can also take complex
	arguments.
CEILING	Smallest integer greater than or equal to value.
	CEILING(value)
	Examples
	CEILING(3.2) returns 4
	CEILING(-3.2) returns -3
DEG→RAD	Degrees to radians. Converts value from Degrees angle
	format to Radians angle format.
	DEG→RAD(value)
	Example
	DEG→RAD(180) returns 3.14159265359, the
	value of π.
FLOOR	Greatest integer less than or equal to value.
	FLOOR(value)
	Example
	FLOOR(-3.2) returns -4
FNROOT	Function root-finder (like the Solve aplet). Finds the value for
	the given variable at which expression most nearly evaluates
	to zero. Uses guess as initial estimate.
	FNROOT(expression, variable, guess)
	Example
	FNROOT(M*9.8/600-1,M,1) returns
	61.2244897959.
FRAC	Fractional part.
	FRAC(value)
	Example
	FRAC (23.2) returns .2

Using mathematical functions 10-15