Commonly used Math library functions.

Function	Purposes
ceil(x)	Rounds x to the smallest integer not less than x ceil (8.1) = 9.0 and ceil (-8.8) = -8.0
cos(x)	Trigonometric cosine of x (x in radians)
exp(x)	Exponential function ex
fabs(x)	Absolute value of x If x>0 then abs(x) is x If x=0 then abs(x) is 0.0 If x<0 then abs(x) is -x
floor(x)	Rounds x to the largest integer not greater than x floor (8.2) = 8.0 and floor (-8.8 = -9.0)
log(x)	Natural logarithm of x(base e)
log10(x)	Logarithm of x (base 10)
pow(x,y)	x raised to power y (xy)
sin(x)	Trigonometric sine of x (x in radians)
sqry(x)	Square root of x
tan(x)	Trigonometric tangent of x (x in radians)