List of Function in Maths Library of C, math.h

ABS(x)
Return absolute (unsigned) value. (macro)
fabs(x)
Return absolute (unsigned) value. (Function)
ceil(x)
Rounds up a "double" variable
floor(x)
Rounds down (truncates) a "double" variable.
exp(x)
Find exponent
log(x)
Find natural logarithm
log10(x)
Find logarithm to base 10
pow(x,y)
Raise x to the power y
sqrt(x)
Square root
sin(x)
Sine of (x in radians)
cos(x)
Cosine of (x in radians)
tan(x)
Tangent of (x in radians)
asin(x)
Inverse sine of x in radians
acos(x)
Inverse cosine of x in radians
atan(x)
Inverse tangent of x in radians
atan2(x,y)
Inverse tangent of x/y in radians
sinh(x)
Hyperbolic sine
cosh(x)
Hyperbolic cosine
tanh(x)
Hyperbolic tangent