Functions of __ function in Cmath

The <cmath> header file wants users to provide a collection of functions that can be used for general mathematical calculations.

function	Description	Sample
ceil (x)	up to complete	ceil (9.2) =10.0
cos (x)	x Chord	cos (0.0) =1.0
exp (x)	exponential function, X of square	exp (1.0) =2.71828
fabs (x)	x Absolute value	fabs ( -5) =5
Floor (x)	rounding down	Floor (9.2) =9
fmod (x,y)	x/y floating-point number remainder	fmod (2.6,1.2) =0.2
log (x)	X's natural logarithm (base e)	log (2.17282) =1.0
log10 (x)	the logarithm of x (base)	log10 (=1)
Pow (x,y)	x's y power	pow (2,7) =128
sin (x)	x sine	sin (0.0) =0
sqrt (x)	x's square root (x nonnegative)	sqrt (9.0) =3.0
Tanx (x)	x (Tangent	tan (0.0) =0

Cmath